With a drag coefficient of 0.22, no car is as sleek as the new A-Class Sedan

Mercedes-Benz is kicking off the promotional campaign for the A-Class sedan, and the first order of business is bragging about the sedan’s drag coefficient of only 0.22, a record figure it is expected to share with the Mercedes-Benz CLA 180 CDI BlueEfficiency model. The silky smooth A-Class Sedan is a product of Mercedes’ renowned engineering capabilities. The model’s sleek styling was created in a wind tunnel specifically to achieve that record drag coefficient number.

Mercedes Managed to Make the A-Class Sedan the Most Aerodynamic Production Car in the World but Who Cares?
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Drag coefficient in the context of the auto industry is a dimensionless quantity that automakers use to quantify the resistance of an object in a fluid environment

Mercedes-Benz is known in the industry for having cars with some of the best aerodynamic properties in the business. It’s the reason why the CLA 180 CDI BlueEfficiency held the record as the most aerodynamic car in the world, and why the A-Class Sedan is now giving it a run for its money.

For those who need a brief explanation, drag coefficient in the context of the auto industry is a dimensionless quantity that automakers use to quantify the resistance of an object in a fluid environment, which, in this case, is air. A lower drag coefficient means that a car will have less aerodynamic drag, making it less susceptible to have its performance capabilities impeded by the aforementioned fluid environment.

It goes without saying that a big part of why Mercedes models are known for their aerodynamic qualities revolves around the time they spend getting tested in the company’s wind tunnels. This is where every square inch of a car is looked at to determine strong and weak aero spots and make the necessary adjustments to address them. In the case of the A-Class Sedan, the front and rear wheel spoilers were tweaked to help improve the channeling of air around the wheels.

Mercedes Managed to Make the A-Class Sedan the Most Aerodynamic Production Car in the World but Who Cares?
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The German automaker also came up with a new sealing concept, which is used in certain areas of the sedan, including the area around the headlights

The German automaker also came up with a new sealing concept, which is used in certain areas of the sedan, including the area around the headlights. This new sealing concept helped Mercedes create an almost complete paneling of the car’s underbody. Even the A-Class Sedan’s wheels and tires were aerodynamically tested to ensure that they help the car achieve its record-tying 0.22 drag coefficient.

Beyond its record-setting drag coefficient figure, the new A-Class Sedan will retain use of the hatchback’s wheelbase, as well as the engine options and the tech features and gadgetry. Mercedes also expects the A-Class Sedan to come with best-in-class rear headroom. By the looks of it, the Mercedes A-Class Sedan is shaping up to be one of the most intriguing Merc releases of the year.

Further reading

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2018 Mercedes-Benz A-Class Exterior
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Read our full review on the 2018 Mercedes-Benz A-Class.

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Press release

With a Cd value of 0.22 and a frontal area of 2.19 m², the new A-Class Sedan has the lowest drag of any production vehicle worldwide and thereby defends the original world record of the CLA Coupé.

Fresh wind for saving fuel: For three decades now, the aerodynamics engineers at Mercedes-Benz have been repeatedly setting new records. The world record is currently held by the new A-Class Sedan with a Cd value of 0.22 and a drag of less than 0.49 m2. With a Cd value from 0.25, the new A-Class hatchback, too, surpasses its already excellent predecessor (Cd value: from 0.26/frontal area: 2.20 m2).

The good aerodynamic properties make a key contribution to low fuel consumption under everyday conditions. The A-Class Sedan was optimised down to the smallest detail by a multiplicity of computation loops, CAE simulations (computer-aided engineering) and measurements in the wind tunnel in Sindelfingen. In addition to the outstanding exterior shape, there are many small measures that led to the new record: a sophisticated reduction of the frontal area despite significantly improved interior comfort dimensions, an extensive sealing concept (such as the sealing of the headlamp surroundings) as well as almost complete panelling of the underbody, which includes the engine bay, main floorpan, parts of the rear axle and the diffuser.

The front and rear wheel spoilers were optimised specifically to route the air around the wheels as efficiently as possible. The rims and tyres also underwent aerodynamic fine-tuning. Depending on the market, an optional two-part shutter system behind the radiator grille is available, which minimises the airflow through the engine bay.

The A-Class Saloon will launch at the end of 2018. The four-door notchback has the wheelbase of the hatchback (2729 millimetres) as well as the proportions of a dynamic and yet compact saloon with short overhangs at front and rear. It is at the top of its segment with regard to rear headroom. In addition, the saloon model has the familiar A-Class virtues. These include modern, efficient engines, a high level of safety thanks to state-of-the-art driving assistance systems with S-Class functions, and the intuitively operated and learning MBUX – Mercedes-Benz User Experience infotainment system.

The new streamlined A-Class Saloon will be built in Aguascalientes, Mexico, and Rastatt, Germany; it was developed in Sindelfingen, Germany.

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