Author Topic: E-Class Cabriolet 2010  (Read 8264 times)

Offline fasteddy

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E-Class Cabriolet 2010
« on: December 24, 2009, 12:11:18 PM »

Offline fasteddy

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Re: E-Class Cabriolet 2010
« Reply #1 on: December 24, 2009, 12:14:31 PM »
Four seasons, four personalities

? Comfortable: AIRCAP ? automatic draught-stop plus AIRSCARF ?
? Quiet: acoustic soft top as standard
? Safe: robust roll-over protection and new headbags

The highly appealing and emotionally charged Cabriolet is the latest addition to the successful Mercedes-Benz E-Class line-up. The open-top two-door model, which goes on sale on 11 January 2010, features a classic fabric soft top, making for a stylistically pure cabriolet feeling. Viewed from the side, the new model is an intriguing proposition ? with its clear proportions and a flawless cabriolet silhouette. In keeping with the motto "four seasons, four personalities", all-year-round suitability was right at the top of the developers' list of priorities. With the new E‑Class Cabriolet, the cabriolet season lasts the whole year because, while many cabriolets tend to disappear from the roads of Western Europe in the autumn, the Mercedes-Benz E-Class Cabriolet (length/breadth/height: 4698/1786/1402mm) provides driving pleasure and comfort whether the roof is open or closed. New features include: ? The AIRCAP? automatic draught-stop: always on board and easily controllable at the push of a button, it reduces turbulence substantially for all four seat occupants ? The modified AIRSCARF? neck-level heating system ? The acoustic soft top fitted as standard The soft top can be opened and closed fully automatically within 20 seconds ? even when driving at speeds of up to 40 km/h. The cabriolet roof is stowed in a special compartment behind the rear panel. A retractable cover separates the soft top compartment from the boot area; it must be closed in order to close the soft top. If the roof is to remain closed, the cover can be slid rearwards, in which case the boot capacity is increased by 90 litres to 390 litres. A through-loading feature is included as standard for the new Cabriolet, as is EASY-ENTRY ? a manually operated entry and exit aid for the rear passengers. The powerplants for the new E-Class Cabriolet are equally innovative: the new direct-injection diesel and petrol models combine efficiency with effortlessly superior power delivery. The exemplary, low fuel consumption has not only been achieved because of the new engines, but also with a number of practical measures. These include on-demand activation of the steering and fuel pumps, the use of tyres with low rolling resistance and an alternator control system which takes account of the current driving situation and the vehicle's electrical power requirements, plus the crucial factor of outstanding aerodynamics.

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Re: E-Class Cabriolet 2010
« Reply #2 on: December 24, 2009, 12:15:17 PM »

 The Cabriolet's cd figure of 0.28 is the best in its class, marking a continuation of the E-Class success story in the field of aerodynamics. An overview of the engines: ? E 250 CDI BlueEFFICIENCY Cabriolet: 150 kW/204 hp ? E 350 CDI BlueEFFICIENCY Cabriolet: 170 kW/231 hp ? E 250 CGI BlueEFFICIENCY Cabriolet: 150 kW/204 hp ? E 350 CGI BlueEFFICIENCY Cabriolet: 215 kW/292 hp ? E 500 Cabriolet: 285 kW/388 hp
Less turbulence, easier to use: AIRCAP? is a world-first
In 1989, Mercedes-Benz introduced a world premiere in the shape of a draught-stop for the SL model series, followed in 2004 by the AIRSCARF? neck-level heating system to further enhance comfort in open-top models. Now comes another world-first: the AIRCAP? automatic draught-stop, which can be activated at the push of a button, greatly reduces turbulence in the interior of the new Mercedes E-Class Cabriolet, creating a sea of warm air. It is also much easier to implement and use than conventional draught-stops: there is no tricky installation, the two individual rear seats remain free and the Cabriolet's flowing side lines remain uninterrupted. AIRCAP? is therefore a classic Mercedes innovation: functional, comfort-enhancing, elegant and safe. AIRCAP? consists of two components: a wind deflector that can be extended by around six centimetres with a net in the windscreen frame and a draught-stop between the rear seats. The functions of the two components: ? Elevation of the free flow above the interior ? Net at the front increases the basic pressure in the interior ? Draught-stop at the rear reduces the backflow As well as enhancing occupant comfort and wellbeing, the reduction in draught when AIRCAP? is activated (it can be activated at speeds of up to 160 km/h and remains in use right up to the car's top speed) reduces the interior noise level ? so passengers in all seats find it far easier to communicate.

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Re: E-Class Cabriolet 2010
« Reply #3 on: December 24, 2009, 12:15:58 PM »
The Cabriolet Comfort package includes AIRCAP? with AIRSCARF?. This patented system functions like an invisible scarf, which warms the occupants' head and neck areas. AIRSCARF? is integrated into the backrests of the front seats and provides warm air through outlets in the head restraints. The Mercedes engineers have modified this unique innovation specifically for the E-Class Cabriolet: in this model, an adjustment wheel pivots the outlet nozzle upwards and downwards by a total of 36 degrees over and above the head restraint height adjustment, meaning that the driver and front passenger can enjoy the unique neck-level heating regardless of how short or tall they are.
Quiet, warm and windproof: acoustic soft top fitted as standard
audible from speeds of just 80 km/h, for example when driving through a tunnel or overtaking a convoy of trucks. At higher speeds, the benefits of the acoustic soft top are even more tangible. For instance, it is possible to have a perfectly normal phone conversation in hands-free mode even when travelling at a speed of over 200 km/h. The soft top is of course waterproof and windproof. Plus it can be put through an automatic carwash without any hesitation. With a total thickness of 23.5 mm, the fabric soft top offers excellent thermal insulation, meaning that the E-Class
Cabriolet is also ideal for use in winter.
Safety: robust structure, anticipatory protection and windowbags

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Re: E-Class Cabriolet 2010
« Reply #4 on: December 24, 2009, 12:16:41 PM »
Aerodynamics
Only the aerodynamicist knows the answer?
Efficient: the more streamlined the design, the lower the fuel consumption? Quiet: low air swirl means low noise? Exemplary: the E-Class of 1984 ? and today's model
In 1984, the E-Class (model series W124) achieved an aerodynamic landmark, posting a cd figure of 0.29. It became, and remains, the benchmark against which all saloons have to be measured ? a benchmark that very few manage to match. Design elements such as smooth surfaces, an inwards-drawn rear end and a clear spoiler lip on the boot lid remain at the heart of good aerodynamic design to this day.Since then, Mercedes has been working tirelessly to reduce this figure by yet more crucial hundredths. After all, lowering the cd figure by 0.01 is equivalent to a reduction of one gram of CO2 per kilometre (NEDC) or two grams in the case of average real consumption (MBVT) and as many as five grams of CO2 per kilo-metre at 150 km/h.The new E-Class family is the new benchmark in the automotive world. Although the base tyres are becoming increasingly wide ? not necessarily to the delight of the aerodynamicists ? and the wheels are becoming increasingly large, the Saloon version is one of the world's most streamlined four-door models, with a cd figure of 0.25. And the Coup? model's cd figure of 0.24 is a new record for production cars.The detailed work behind this development is highlighted by the following examples:
? The louvres behind the radiator grille are mainly closed when there is no particular demand for cool air, thus reducing pressure losses at the front of the vehicle and air swirl on the underbody. Here the payoff is an improvement in aerodynamic drag to the tune of five percent or a 0.01 reduction in the cd figure
? Small spoiler lips on the tail lights homogenise the airflow at the rear. The airflow is forced to break away at a clearly defined point. There is therefore a uniform spoiler lip across the entire rear end
? The contours of the spokes and the rim flanges have been optimised to ensure levels that were only previously achievable by using smooth-surfaced hub caps
? The underbody panelling has been optimised, while the spare wheel well is designed as a diffuser
? In isolation, tweaking the shape of the spoilers in front of the wheels, the rubber sealing sections or the underbody panelling only brings about a minimal improvement in each case; however, when combined, these measures contribute to the world-leading cd figureThe new E-Class Cabriolet also benefits from all of these measures. Naturally, the fabric soft top cannot quite match the closed sheet-metal design of the Coup?.

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Re: E-Class Cabriolet 2010
« Reply #5 on: December 24, 2009, 12:17:45 PM »
But the fabric and the contours of the folding top have been optimised to such an extent (see the section entitled "The roof" in this press kit) that the Cabriolet likewise achieves the best aerodynamic performance in its segment with a cd figure of 0.28.
Calmness itself: acoustic optimisation right from the start
Wind noise is another discipline of aerodynamics. Key requirements for a low wind noise level in the interior include draughtproof door and window seals. This requirement especially applies to cars with frameless side windows such as the new E-Class Coup? and Cabriolet.Measuring tools such as dummy heads and directional microphones enable even the slightest weakspots to be pinpointed. These can then be eliminated by implementing the best possible technical solutions. At a very early stage in the development of the new, sporty E-Class model, a three-metre concave acoustic mirror was used to optimise the exterior shape of the A-pillars and the shape of the exterior mirrors in the wind tunnel.The Cabriolet model marks the debut of a new acoustic soft top, which is fitted as standard, giving the E-Class one of the lowest-noise interiors in the segment for four-seater premium cabriolets with a fabric soft top. It is therefore possible to have a perfectly normal phone conversation in hands-free mode at speeds of over 200 km/h. Further details can be found in the section entitled "The roof" in this press kit. AIRCAP? ? an innovative ideaLess draught at the push of a button?
Practical: AIRCAP? reduces in-car turbulence at the push of a button? Comfortable: sea of warm air washes around passengers, even at high speed? Refined: combination of wind deflector and adjustable draught-stop
Whether you want to feel the wind in your hair or not is entirely up to you: the new Mercedes-Benz E-Class Cabriolet is the first car that can fulfil either of these wishes at the push of the button. The innovation behind this is called AIRCAP? ? an automatic draught-stop system that reduces interior turbulence at all four seats whilst setting new standards in terms of ease-of-use and acoustic comfort. At the same time, this innovation enables the Mercedes-Benz E-Class Cabriolet to be driven with the top down in all four seasons ? even with a full complement of occupants on board. When paired with the further improved Mercedes innovation AIRSCARF?, it makes open-top driving a highly pleasurable fresh-air experience, even when the temperature outside plummets. Because a 'cap and scarf' are always on board.AIRCAP? consists of two components: a wind deflector that can be extended by around six centimetres with a net in the windscreen frame and a draught-stop between the rear seats. AIRCAP? therefore meets two aerodynamic requirements: the wind deflector elevates the airflow, while the net raises the pressure level in the interior in a controlled manner, thus reducing the backflow, which is curbed and equalised by the draught-stop. Hence the air movements in the interior of the E-Class Cabriolet are reduced substantially, creating a sea of warm air: warm air flowing into the interior from the heating system remains there for much longer when AIRCAP? is activated. Similarly, on extremely hot days, the air conditioning and AIRCAP? allow the passengers to enjoy a pleasantly cool interior, even when the roof is open.
Practical and comfortable: a new dimension of open-top driving
AIRCAP? offers a wealth of benefits over conventional bracketed draught-stops:? No manual installation or removal required? Rear seats always remain fully accessible ? either for passengers or for luggage items such as sports bags or briefcases? No need to stow the draught-stop in the boot when it is not in use, which would take up valuable space? Vastly improved all-round visibility? Total fresh-air experience available at the push of a buttonDuring a product clinic organised by the Mercedes Market Research department, cabriolet drivers were able to test the new system on prototypes ? and they welcomed it enthusiastically. Not least because the central control panel can be used to operate the AIRCAP? functions and, at the push of a button, lower all four side windows simultaneously. Furthermore, the driver can activate the AIRCAP?
system in a matter of seconds at speeds of up to 160 km/h, while the system can remain in use right up to the car's top speed.The front element of the AIRCAP? system ? the wind deflector with perfused net in the windscreen frame ? is switched to either on or off. Meanwhile, the small draught-stop between the rear head restraints, together with which it is moved up and down electrically, has three positions: retracted, half extended and fully extended. In the lower position, AIRCAP? is deactivated. When the AIRCAP? button is pressed, the system adopts the middle position, in which case the front occupants enjoy the full benefit of less driving wind, while all-round visibility is not impaired.
If one of the rear occupants puts on a seat belt (i.e. if at least one of the rear seats is occupied), the head restraint and draught-stop move to their highest positions, meaning that even the rear passengers enjoy better protection from the wind than passengers in conventional cabriolets. Finally, the wind deflector module can also be extended when the roof is up, for cleaning purposes, thanks to a special switching system.When AIRCAP? is activated, not only is there less draught, meaning increased comfort, the interior noise level is also reduced substantially ? all passengers
therefore find it much easier to communicate with each other.
How it works: a triumph of aerodynamics and design
Many years of intensive development work were required before AIRCAP? was ready for series production. When the team of aerodynamics experts headed by Peter Dannh?user and Dr Alexander W?schle started developing the automatic draught-stop for the E-Class Cabriolet, they seized an idea that had already been tested for the E-Class Cabriolet (model series 124) at the beginning of the 1990s but could not be implemented (see section entitled "Under the microscope ? from KOF4 to AIRCAP?").The function of the two components soon became clear:
? Elevation of the free flow above the interior? Net at the front increases the basic pressure in the interior
? Draught-stop at the rear reduces the backflow
? Faint secondary swirl in the lower area of the passenger compartmentHowever, many simulations (see section entitled "Under the microscope: flow simulation") and numerous wind tunnel tests were required to optimise the exact dimensions and positions of the two AIRCAP? elements.
Selecting suitable nets proved especially time-consuming: over two hundred different combinations were tested until the optimum material mix was found in terms of perfusion, dirt deflection and durability.Implementing the idea in series production then provided a further major hurdle for the team around Bernd Plocher together with the designers Daniel Seifert and Serkan Fidan. The invention of a new four-link kinematic system allowed them to integrate the extendable wind deflector into the smallest of spaces in the upper windscreen frame without altering the latter's contours and, therefore, the car's flowing lines. The intelligent construction and the selection of high-strength lightweight materials enabled them to produce an extremely slender wind deflector. It proved particularly tricky to house the electric drive system in a cavity measuring just three centimetres across ? but a specially contracted Swiss supplier eventually came up with a suitable drive motor with a diameter of 1.8 centimetres and a torque of six Newton metres.
The wind deflector also had to be designed to withstand the heavy pounding by the wind and weather without letting moisture or dust reach the car's interior or the sensitive drive components ? all of which was verified in extensive tests (see section entitled "Testing" in this press kit). Finally, the protective effect of the windscreen frame had to remain fully intact in the event of roll-over. This was achieved thanks to the integral design of the front wind deflector module with the kinematic elements.The wind deflector module is also an integral part of the PRE-SAFE?functions for the E-Class Cabriolet. If an imminent accident is detected, AIRCAP?retracts into the windscreen frame at lightning speed.The wind deflector module comprises a total of 211 individual components (motor/gear unit counted as one component), while the 32 different materials used are protected against all environmental influences by 14 different coatings and surfaces.

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Re: E-Class Cabriolet 2010
« Reply #6 on: December 24, 2009, 12:18:44 PM »
One further number clearly underlines the lengths to which the developers went to enhance comfort for cabriolet drivers: the development is protected by almost 20 patents.AIRCAP? is a world-first which sees Mercedes-Benz continuing its tradition of using innovations to make open-top driving exceptionally comfortable and safe. It was in 1989 that the brand introduced the first draught-stop as a world premiere in the SL model series ? a feature that has now long been standard in roadsters and cabriolets made by many other brands. Here are some of Mercedes-Benz's other pioneering achievements:Mercedes innovations have been making open-top driving safer and more comfortable for over 45 years 1963Standard equipment for the 230 SL (W 113) included a removable coup? roof. The two-seater's nickname "Pagoda" was derived from the roof's classic shape. The removable coup? roof remained a regular feature of Mercedes sports cars up until the launch of the SL with vario-roof (R 230, 2001).1989The automatic roll-over bar and the draught-stop for the Mercedes SL (R 129) were world-firsts in the automotive industry.1996With the first-generation SLK (R 170), Mercedes-Benz revolutionised the idea of open-top driving: the folding top was made from steel rather than fabric, which is why the developers called it the "vario-roof".2004The Mercedes SLK (R 171) marked the debut of the AIRSCARF? neck-level heating system.
This patented system enables conditioned air to flow out of the head restraints to warm the driver and front passenger around the neck area.Under the microscope: the history of an ideaA triumph for the tinkerersGood things come to those who wait: as far back as the early 1990s, when developing the cabriolet variant of the E-Class of that time (W124), the Mercedes aerodynamicists were looking for ways to reduce turbulence in the interior in order to give all passengers a true open-air experience without the all-too-annoying draught. The project was called KOF4 ? from the German for 'comfortable open-top driving for 4'. They tinkered for some two years before the project was finally shelved in 1992.People today who see the pictures of the variants tested in the 1990s quickly understand why the company management gave KOF4 the thumbs down: the various draught-stop combinations, which could be mounted on the windscreen and behind the rear seats, looked too clumsy.
As ever, the engineers had been very thorough at the start of the project: the basic turbulence principles were tested on an A124 prototype in the wind tunnel. The result of these tests is still valid to this day: the only way to achieve the desired effects is to combine a wind deflector at the front, including controlled airflow to elevate the flow, with a draught-stop behind the rear seats. Showing typical Swabian thoroughness, the engineers then tested numerous profiles, louvres and flap solutions to optimise the effect and minimise the amount of installation space required. Their conclusions: satisfactory functioning, but inadequate aesthetics and controllability. The materials were simply not yet intelligent enough and the components not yet small enough for KOF4 to go into series production.
Shelved but not forgotten: ten years later, in July 2003, the KOF4 project was resurrected for the new E-Class Cabriolet. A specifications book was drawn up, and initial test drives took place as early as November of that year with a louvred variant. The designers tested an active solution, deciding on a pivotable variant. But they were quick to realise that the result did not meet the Mercedes requirements for quality and design.But Mercedes engineers are nothing if not persistent, and the project was revived again as early as October 2004. This time, they looked at a "snap-on" solution; however, this solution did not deliver the desired success in terms of easy handling. Detailed aerodynamic investigations in this project phase revealed that the KOF4 objectives were achievable: significantly enhanced comfort in the rear seats and no adverse effects for the front passengers when compared with the conventional bracketed draught-stop.The fourth attempt, which began in late 2005, finally brought the breakthrough: a wind deflector which is retracted into the windscreen frame when not in use, complemented by an adjustable draught-stop between the rear head restraints. A great many design challenges still had to be overcome but, a good four years later and almost 20 years after the first idea, and after non-stop hard work characterised by dogged determination, KOF4 is now going into series production in the new E-Class Cabriolet. Now the roof made of air has a new name ? AIRCAP?Under the microscope: component and full-vehicle testingTwo summers and two winters in one yearAlways on the road all over the world in the very latest cars - not only motoring
journalists have such a exciting profession, but also test drivers. Jochen Prokein from the Mercedes department responsible for full-vehicle testing is one of the latter and had already clocked up tens of thousands of miles in the new Mercedes-Benz E-Class Cabriolet long before its launch. But before a new car undergoes full-vehicle testing, the individual components have already come through an exhaustive programme of tests of their own. Take, AIRCAP?, for example: in a special climatic chamber at temperatures between minus 25 and plus 80 degrees Celsius, the front wind deflector was retracted and extended 50,000 times and, on top of this, blasted with dust and water aimed specifically at the bearing points. In addition to this, the component took part in an extreme wind-load test involving wind speeds of between 60 and 250 km/h, in which it had to be activated more than 10,000 times to prove its wind-load resistance. For this test, the "small wind tunnel" in Sindelfingen, usually employed for developing the 1:4 models, had to be put to a different use. In special climatic chambers in which huge amounts of chemicals are admitted, the wind deflector was tested in its opened and closed states, during which time it had to remain
resistant to corrosion for an entire vehicle lifetime. Further methods of torture involved carwashes as well as steam-blasting and icing tests. "We conducted a misuse test as we also wanted to know what happens when someone leans on or against the extended component, for example to aid getting in or out of the car," says designer Daniel Seifert.Only once the individual components have come through this sequence of suffering can full-vehicle testing begin. Then the key factor becomes the interaction of all the components in the vehicle.
"We are in effect the first customers," says Prokein, who organised this part of the testing for the E-Class Cabriolet. "The old rule about a new vehicle having to experience two summers and two winters during testing essentially still applies," explains Prokein. "The only difference now is that all this has to happen within a single year if possible." This is why the testers work in two shifts, testing the prototypes on the road day and night.And they do this all over the world: in Texas, the cars undergo "hot-country testing" in temperatures of up to 45 degrees Celsius at the Daimler proving ground. "This time, we were particularly keen to see how the AIRCAP?innovation fared in a combination of heat, high humidity and dust," states Prokein. Naturally, the new draught-stop system also had to withstand these punishing conditions. Testing also focussed on the standard-fit acoustic soft top, which is stowed in the soft top compartment in a different manner to a conventional soft top on account of its special design. As one would expect, the standard Mercedes test programme for open-top cars also includes frequent activation of the soft top as well as driving on torture tracks to test torsional stiffness.Further destinations for the team testing the full vehicle included Papenburg/Lower Saxony, Nardo/Italy and, for winter testing, northern Sweden. The ageing factor in these tests was approximately ten. In other words, 5000 kilo-metres on the notorious Belgian Block route in Laredo are equivalent to around 50,000 kilometres of normal everyday driving, for example.
"We are always on the road with at least four vehicles, and we try to cover as many models in the range as possible," explains Prokein, who was a designer prior to working in full-vehicle testing. As many different engines, equipment items and appointments as possible ? from seats to cover fabrics ? are used, since this approach allows the team to assess the interaction between literally all of the components. The test vehicles used by Prokein and his team are always state-of-the-art: whether it be modified components or the latest software updates, whatever is devised during the process of making a new car ready for series production in Sindelfingen goes straight into the cars used for full-vehicle testing.
Under the microscope: flow simulation Sea of air SindelfingenNeither wellingtons nor a compass were required for this expedition as the Mercedes engineers actually discovered a sea of warm air in the wind tunnel. Such volumes of air can also be discovered by means of computer-aided flow simulation, although this requires a great deal of calculation work and aerodynamic know-how. For numeric flow simulations, Mercedes-Benz uses a finite-volume process as a mathematical model. Using the CAD data for the new Mercedes-Benz E-Class Cabriolet, Alexander W?schle and his team constructed a closed surface network.By modelling the vehicle environment using around 30 million hexahedrons (small cubes), the engineers were able to simulate driving across an open area in a large, virtual wind tunnel. They allowed the air to flow at a realistic speed and with realistic turbulence.As the flow conditions change very quickly over time whilst driving, the calculations had to be made in a non-stationary state using many small time steps. This meant that a high processing capacity was required: around 500 processors in parallel performed calculations for some two weeks, allowing the Sindelfingen airflow specialists to analyse the sea of warm air in a virtual environment."If you turn things around, the system functions in a similar way, of course," says AIRCAP?developer Peter Dannh?user:
"If the E-Class Cabriolet driver wants the air conditioning to cool the interior in the summer, AIRCAP?Under the microscope: Tanja the test dummyHalf a womanTanja shivers. She has just had the most tiring of afternoons involving hours of tough tests. We meet the young lady near where she works: in the wind tunnel at the University of Stuttgart in the suburb of Vaihingen. Mercedes-Benz is a long-term tenant here. And Tanja is a regular. For she is the test dummy the Mercedes developers use to test new cabriolet models in the wind tunnel. And this can take time ? hour after hour in severe storms. So it's hardly surprising that she looks a little dishevelled. But she kindly agreed to be interviewed nonetheless. ? may we call you Tanja...? Tanja: ?of course, that's what everyone calls me? Tanja: My current employer discovered me in the store room at a boutique and recruited me immediately, marking the end of my career in the shop window. But I was glad to be out of it and get the opportunity to do something really useful. I am a Swabian, after all. Tanja: The engineers gave me a sleeveless little black number and then set about accessorising my head (minus the usual wig, unfortunately, without which I feel so naked), my neck and my arms with a total of 16 speed sensors to measure the wind flow speed in the interior of the car. Tanja: The measurements are subsequently weighted, since a draught on the neck is far more annoying than a draught on the top of the head. The weighted measured values are then added together to give what is known as a "wellbeing factor". This figure indicates how effectively people sitting in the cabriolet are protected against draughts. Tanja: Because I actually work as a man. Or, to be more exact, as two men: a 75‑percent man at the front and a 50-percent man in the rear of the car. Tanja: It's quite simple. At the front, the way I am sat means that I am taller than 75 percent of all men. At the rear, I am as tall as the average man. But I'm lucky really: my colleague Walter doesn't have a body at all. Tanja: "Heard" is an apt word to use. Walter is a dummy head. They use him to measure wind noise in the cabriolets. Tanja: It was tough at the start. AIRCAP Tanja: A salvation. You would not believe what it feels like after all that turbulence in the sea of warm air. Even on the rear seats. Even if it does blow around your head a bit more there. Nevertheless, AIRCAP Tanja: To be brutally honest, a coup?. I get enough cabriolet driving as part of my job.AIRSCARF?neck-level heatingA warm feeling for occupants big and small?
Designed for all shapes and sizes: height-adjustable together with head restraint and also pivotable? Range of temperatures: three levels for controlling the flow of warm air? For all to see: thermography photos confirm presence of blanket of warm air
Two thirds of Mercedes SLK and Mercedes SL models are ordered with
AIRSCARF?, making the neck-level heating system one of the most popular optional extras for these two model series. This patented system functions like an invisible scarf, which warms the occupants' head and neck areas. AIRSCARF?is integrated into the backrests of the front seats and provides warm air through outlets in the head restraints. The Mercedes engineers have modified this unique innovation specifically for the E-Class Cabriolet: in this model, an adjustment wheel pivots the outlet nozzle upwards and downwards by a total of 36 degrees over and above the head restraint height adjustment, meaning that the driver and front passenger can enjoy the unique neck-level heating regardless of how short or tall they are.In combination with the AIRCAP?automatic draught-stop (see page 11 of this press kit), the innovative neck-level heating system is even more effective at providing a flow of warm air, since the air inside the E-Class Cabriolet is already pre-heated before it is taken in by the blower in the backrest and passed through an electric heating element with an output of around 200 W and an operating current of 19 A. From here, the warm air passes through a plastic duct into the head restraint, where it is blown out of the adjustable air outlet. In this way, the Mercedes experts are able to provide warmth for all the occupants and pleasant temperatures at head height for the driver and front passenger when a cold wind is blowing over the Cabriolet.As well as requiring very little space, this innovative Mercedes technology also has the major advantages of delivering warm air quickly and providing a constant heat output. The heating element in the backrest is based on sophisticated PTC (Positive Temperature Coefficient) technology: ceramic particles are energised so that they heat up in a matter of seconds and then give out continuous heat.

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Re: E-Class Cabriolet 2010
« Reply #7 on: December 24, 2009, 12:18:57 PM »
The ceramic system protects itself against overheating by monitoring its own surface temperature and reducing the power consumption automatically when required. Nevertheless, the heating effect remains constant.AIRSCARF?can be started at the push of a button. At speeds of up to 120 km/h, a control unit calculates the ideal warm air distribution automatically ? depending on the interior and exterior temperature, on whether the soft top is open or closed, and on the vehicle speed. Above this speed, the system operates on a constant setting. Furthermore, the driver and front passenger can set the speed of the radial fan and, therefore, the heat supply, to any one of three levels, all at the push of a button on the centre console. The powerful AIRSCARF?system produces up to 27.4 kilograms of warm air per hour.Shots taken using the thermography camera show how effectively the patented AIRSCARF?system operates at low outside temperatures in winter. Costing some ? 50,000, the special camera enables people to see that which usually remains invisible: the heat radiated by persons or objects.The principle at work here is as follows: at temperatures above absolute zero (i.e. minus 273 degrees Celsius), all objects essentially radiate heat ? even ice cubes or snowballs. This thermal energy is infrared light with a wavelength that the human eye cannot perceive. The higher the temperature of the object, the more intense its infrared radiation.
The AIRSCARF?tests conducted by the Mercedes engineers using the thermography camera are based on this fundamental physical principle. The camera's highly sensitive lens scans the driver, the seat backrest and parts of the interior, making heat visible: zones with high heat radiation appear in red, violet and white on the monitor, while cooler areas are coloured green or yellow. The dark blue and black areas, on the other hand, are the areas where the temperature is at its lowest. The thermograms clearly show where a large, wide sea of warm air is produced in the E-Class Cabriolet.In addition, testers wear special measuring shirts during the tests. These garments are equipped with a total of 14 measuring points distributed around the throat, neck and shoulder areas, which can measure the various temperatures individually, allowing the distribution of warm air to be analysed.When developing the AIRSCARFDesignThe stuff of which cabriolet dreams are made?
Classic: elegant cabriolet silhouette thanks to soft top? Family ties: twin-headlamp face and muscular stature? High quality: refined interior surfaces
From the very first drawings onwards, the Mercedes designers were sure of one thing: only a classic fabric soft top can convey a stylistically pure cabriolet feeling. Consequently, the new E-Class Cabriolet, which combines an elegant appearance with a high awareness of tradition, had to have a soft top. Viewed from the side, the two-door model therefore offers an enticing mix of clear proportions and a flawless cabriolet silhouette, including a long bonnet, wide doors, a high beltline with elongated side windows, a lowered soft top contour, and a short rear overhang. This look is complemented by the powerfully muscular section in the side wall at the rear axle and a slender C-pillar.As well as sharing family traits with the other E-Class models, the new Cabriolet has its own, distinct identity characterised by a greater sense of passion. The arrow shape of the entire front section from front bumper to radiator grille to
bonnet, the more extreme interpretation of the twin headlamp face and its more sinewy build give it a racier and more dynamic presence. At the same time, the close family ties with the E-Class Coup? are clearly apparent.
The powerful styling accentuates the sleek, flowing lines
A special characteristic of the contemporary Mercedes design idiom is the creative interplay of edges and surfaces. Taut, sharply defined lines, which grow out of surfaces organically and disappear into them again equally gently, structure the sides of the Cabriolet. The high shoulderline, a prominent, downward-pointing feature line (another contemporary Mercedes styling element) and a second structuring line delimit the sensitively sculpted surfaces. Alternately concave and convex, these create a sleek yet sharply defined flow of lines which creates a fascinating interplay of reflected incident light.
Arrow-shaped front and dominant radiator grille
From the front bumper to the radiator grille to the bonnet, the pronounced arrow shape of the front section emphasises the sporty character of the Cabriolet. A
central crease in the bonnet picks up this shape and trails back towards the windscreen. A wide, upright radiator grille with two louvres, striking chrome strips, a powerful chrome surround and the central star testifies to status and self-assurance in time-honoured Mercedes style. The grille makes an effortlessly superior, expressive statement of the brand's identity.The traditional twin headlamp face is based on that of the new E-Class Saloon, but has its own identity. Longer, more sharply inclined and flatter, the headlamps have a more dynamic look which is unmistakable. With their elaborate, high-tech interior and quadrant-shaped indicators, they add a sparkling finishing touch to the front of the vehicle.A distinctive front apron with large air intakes gives the vehicle a strong, powerful presence. Two vertical struts in the front apron provide visual support for the radiator grille and give it a substantial formal base. Depending on the model version, the bumper houses either the fog lamps or the daytime driving lights and fog lamps side by side. In the versions with bi-xenon headlamps, L-shaped daytime driving lights based on LED technology give the vehicle an expressive look.
Powerful rear with innovative lights
"Powerful and not afraid to show it" could be the motto for the rear section of the new E-Class Cabriolet: the rear wings spanning the rear axle are sculpted to create a powerful, muscular form which visually enhances the vehicle's width. The distinctive feature line ? a characteristic Mercedes styling element ? is continued skilfully around the back of the vehicle and into the tail lights, thereby forming a link between front and rear.The LED tail lights are split and extend from the boot lid far into the side wall. In so doing, they emphasise the width and dynamism of the vehicle. Their innovative lighting technology is particularly noteworthy. An LED background lighting system provides indirect illumination of the three-dimensional back cavity in both light units and in this way sets the basic background lighting tone. Twin light arrays with twin LED light guides stand out against the background lighting. These light arrays accommodate the tail lights and the brake lights, while the reversing lights and an additional LED fog lamp are integrated in the boot lid light units.The narrowness of the gap between the light unit on the boot lid and that on the side wall, as well as the extremely precise bevelling of the adjacent light lenses allows light transmission between the two sections. As a result, the night design of the new Cabriolet maintains the perceived width and harmonious appearance of the rear section.
Interior with sporty lines and high perceived value
In the interior, the designers have continued the taut, sporty design idiom of the exterior. The compelling interplay of surfaces and clearly defined lines creates an interior whose elegance and high perceived value are evocative of modern architecture. The cockpit is structured horizontally with a dark upper section in order to avoid unwanted reflections. Interior appointments in two colours ? in keeping with the logic of the two-level structure ? create intriguing contrasts.With its sporty look and feel, the cockpit design is clearly in keeping with the agile character of the new Cabriolet. The instrument cluster with five tubes for the dials and a central display has a slender look, while the dials themselves are clearly laid out and have high-quality chrome surrounds as well as a silver backing for the scales. The background colour of the dashboard is silver or black, depending on the choice of trim elements. The three-spoke steering wheel with multifunction buttons is available in a number of different versions and colours in order to match the interior appointments.Next to the instrument cluster ? and therefore in the primary field of vision of the driver and front passenger ? is the display area for the control and display system for the radio, navigation system and other functions. The system is operated by means of a rotary and push-action Controller which falls conveniently to hand in front of the asymmetrically split armrest between the front seats. This armrest also serves as a handrest when operating the Controller. This is also where the control buttons for the soft top and AIRCAP?are to be found.The horizontally structured dashboard flows into a centre console with a dynamic, arrow-shape where the air-conditioner control unit is to be found along with other features.
Sporty individual seats for the rear passengers, too
The new E-Class Cabriolet is an out-and-out four-seater and also has sportily
designed individual seats in the rear. The front integral seats with pronounced, faceted side bolsters and transverse piping on the seat cushion have a light, contemporary look and immediately create a distinctly sporty impression while offering excellent seating comfort. Another notable characteristic of the seats is the high-quality, hand-stitched workmanship featuring discreet flat-felled seams. Further highlights include the audio system's loudspeakers housed in the soft top compartment cover, which add an extra visual touch, especially when the roof is open.
Fine materialsThe whole interior is dominated by pleasing surface finishes. Trim elements made from valuable, authentic materials emphasise the high-quality of the new Cabriolet. The sporty two-door model is equipped as standard with brushed aluminium trim elements with a sporty spin finish. Customers can also choose from fine woods: burr walnut, high-gloss black ash or the graphic linearity of pine. In all cases, the trim elements have a thin chrome strip along their upper edge.The roofExemplary quiet-running?
Quiet: acoustic soft top as standard for all versions? Safe: exceptional all-round visibility thanks to slender C-pillars? Hard-wearing: soft top can be put through an automatic car wash without hesitation
Thanks to its acoustic soft top, fitted as standard, the E-Class Cabriolet has one of the quietest interiors in the segment for four-seater premium cabriolets with a fabric roof. The soft top's exceptionally high-quality insulation brings about a clearly noticeable reduction in the interior noise level compared to conventional fabric soft tops. Exterior noise caused by other vehicles and wind noise are therefore absorbed more effectively. On the road, the difference is audible from speeds of just 80 km/h, for example when driving through a tunnel or overtaking a convoy of trucks. At higher speeds, the benefits of the acoustic soft top are even more tangible. For instance, it is possible to have a perfectly normal phone conversation in hands-free mode even when travelling at a speed of over 200 km/h.Three new developments enabled the Mercedes-Benz engineers to reduce the interior noise level substantially: the outer fabric coating on the soft top has been acoustically optimised, while a butyl layer in place of the previous neoprene layer on the inside acts as a water barrier. Finally, the intermediate felt layer is structured differently to that of the previous model. This layer also ensures that the elegant silhouette is not disturbed by bows visible from outside.The E-Class Cabriolet likewise sets new standards when it comes to all-round visibility ? important for both looks and safety. The soft top fabric in the C-pillar area is extremely slender thanks to the sophisticated kinematics of the rear windscreen which, rather than being rigidly welded in place, moves out of the soft top fabric when the roof is opened and closed. Special water pockets prevent moisture ingress at the sides.Of course, the soft top itself is also waterproof and windproof. Plus it can be put through an automatic car wash without any hesitation. With a total thickness of 23.5 millimetres, the fabric soft top offers excellent thermal insulation, meaning that the E-Class Cabriolet is also ideal for use in winter. The heated rear windscreen is made of glass and is therefore scratchproof. The soft top is available in black, blue or beige.Supreme ease of use was a key criterion when developing the soft top, which is hydraulically operated by means of seven cylinders pressurised by an electric pump. Fully automatic opening and closing of the roof takes around 20 seconds and is possible at speeds of up to 40 km/h. A pull on the control element on the centre tunnel is all it takes. Alternatively, the roof can be controlled remotely by pressing a button on the key. The soft top engages automatically at the front roof crossmember.The soft top is stowed in a special compartment behind the rear panel. A retractable cover separates the soft top compartment from the boot area; it must be closed in order to close the soft top. If the roof is to remain closed, the cover can be slid rearwards, in which case the boot capacity is increased by 90 litres to 390 litres.Differences between the exterior and interior air pressures can cause a ballooning effect on certain cabriolet models when travelling at high speed. But not in the case of the Mercedes-Benz E-Class Cabriolet: a special zip fastener is used to fasten the soft top firmly to the frame over all three bows. This fastening and the short fabric lengths between the supports are effective at preventing ballooning of the roof when travelling at high speed. Sophisticated test equipment was used to measure and document this effect during the road-testing phase.The cabriolet specialists at Mercedes-Benz also attach great importance to the durability of the fabric soft top. Hence the roof is designed for 20,000 load cycles ? the highest figure in this competitive environment ? equivalent to opening and closing the soft top once on every day of the year for over 25 years. In the unlikely event of the fully automatic closing mechanism failing, for example due to a flat battery, Mercedes-Benz has seen to it that E-Class Cabriolet drivers will not be left in the rain, since the hydraulic system can be depressurised quickly, enabling the soft top to be closed and locked by hand