• The aerodynamics of the EQC with Dr Teddy Woll.

    EQC 400 4MATIC:
    Stromverbrauch kombiniert: 21,5–20,1 kWh/100 km;
    CO₂-Emissionen kombiniert: 0 g/km.⁶

Out of the wind tunnel and onto the asphalt.

The Sindelfingen plant is home to one of the most modern wind tunnels in the world. This is where vehicles are tested for their aerodynamic properties before being launched on the market and optimised as a result. Teddy Woll calls this windy and very futuristic-looking facility his workplace. Woll appreciates the versatility and teamwork of his job. He finds it particularly exciting that the requirements of design and development have to be incorporated into his work: “It's a great job. I have access to models and prototypes in the early stage, and I'm in contact with the designers and engineers to bring together all our know-how and insights – it's great fun!”

Teddy Woll and his team are looking at several monitors and observing the aerodynamic behaviour of the Mercedes-Benz EQC.

Pure physics.

Aerodynamics is mainly about achieving the best possible streamline shape, thus keeping air resistance as low as possible. This is particularly important because optimal aerodynamics promise high energy efficiency. Design, aerodynamics and range are directly related, because the less resistance the vehicle offers, the more energy is saved – which in turn has a positive effect on battery capacity in an electric vehicle like the EQC. The proportion of aerodynamic drag in the total driving resistance increases quadratically with increasing driving speed. Air resistance thus accounts for significantly more than half of the energy consumption during longer journeys at higher speeds.

The resistance is made up of the cross-sectional area that a body faces the wind and the cd value. This value describes how easily the wind can flow around a body and ranges between 0.05 (for the best shapes in nature, but the ones without wheels) and 1 (for a cube).

Teddy Woll is standing in the wind tunnel and holding his hand in the air stream.

A fresh breeze for design.

Woll and his team spent around 500 hours on simulations of the EQC alone. The aerodynamic properties of the real model are then examined in the wind tunnel. The tests clearly show the considerable influence that individual design elements have on the aerodynamics of the EQC. For example, the installation of running boards at the height of the side skirts as well as various measures on the diffuser and front and rear aprons have made it possible to reduce the cd value significantly. 

In addition, there are the advantages of an electric vehicle: on the one hand, the underbody is smooth and completely closed – this not only provides the necessary protection for the battery but also improves the airflow under the vehicle. On the other hand, there is no combustion engine in the front, which requires the large air volumes of a classic radiator grille. In the special radiator grille of the EQC, an active air control system was installed, in which the fins can be completely closed as required to guide the air more effectively over the top and bottom of the vehicle. The specially developed AMG light-alloy wheels also make a significant contribution to the successful aerodynamic performance. All in all, these measures result in an exceptionally low cd value of 0.27.

A fresh breeze for design.

Woll and his team spent around 500 hours on simulations of the EQC alone. The aerodynamic properties of the real model are then examined in the wind tunnel. The tests clearly show the considerable influence that individual design elements have on the aerodynamics of the EQC. For example, the installation of running boards at the height of the side skirts as well as various measures on the diffuser and front and rear aprons have made it possible to reduce the cd value significantly. 

In addition, there are the advantages of an electric vehicle: on the one hand, the underbody is smooth and completely closed – this not only provides the necessary protection for the battery but also improves the airflow under the vehicle. 

On the other hand, there is no combustion engine in the front, which requires the large air volumes of a classic radiator grille. In the special radiator grille of the EQC, an active air control system was installed, in which the fins can be completely closed as required to guide the air more effectively over the top and bottom of the vehicle. The specially developed AMG light-alloy wheels also make a significant contribution to the successful aerodynamic performance. All in all, these measures result in an exceptionally low cd value of 0.27.

Ride like the wind. Enjoy electric.

Not only the team but also our two crew dogs had a lot of fun during the filming in the wind tunnel. However, instead of enjoying the high quality and comfortable interior of the EQC, the four-legged friends preferred to devote themselves to the two things they like best when driving: the open window and a fresh breeze. Of course, this is not very beneficial for the aerodynamics, but it certainly is for driving pleasure.

Two dogs stick their heads out of the side windows of the Mercedes-Benz EQC and enjoy the wind.
Kraftstoffverbrauch kombiniert CO₂-Emissionen kombiniert Stromverbrauch im kombinierten Testzyklus

Product may vary after press date on 28.07.2020.

1 Die angegebenen Werte wurden nach dem vorgeschriebenen Messverfahren ermittelt. Es handelt sich um die „NEFZ-CO₂-Werte“ i. S. v. Art. 2 Nr. 1 Durchführungsverordnung (EU) 2017/1153. Die Kraftstoffverbrauchswerte wurden auf Basis dieser Werte errechnet. Der Stromverbrauch wurde auf der Grundlage der VO 692/2008/EG ermittelt. Weitere Informationen zum offiziellen Kraftstoffverbrauch und den offiziellen spezifischen CO₂-Emissionen neuer Personenkraftwagen können dem „Leitfaden über den Kraftstoffverbrauch, die CO₂-Emissionen und den Stromverbrauch aller neuen Personenkraftwagenmodelle“ entnommen werden, der an allen Verkaufsstellen und bei der Deutschen Automobil Treuhand GmbH unter www.dat.de unentgeltlich erhältlich ist.

4 Angaben zu Kraftstoffverbrauch, Stromverbrauch und CO₂-Emissionen sind vorläufig und wurden vom Technischen Dienst für das Zertifizierungsverfahren nach Maßgabe des WLTP-Prüfverfahrens ermittelt und in NEFZ-Werte korreliert. Eine EG-Typgenehmigung und Konformitätsbescheinigung mit amtlichen Werten liegen noch nicht vor. Abweichungen zwischen den Angaben und den amtlichen Werten sind möglich.

6 Stromverbrauch und Reichweite wurden auf der Grundlage der VO 692/2008/EG ermittelt. Stromverbrauch und Reichweite sind abhängig von der Fahrzeugkonfiguration. Weitere Informationen zum offiziellen Kraftstoffverbrauch und den offiziellen spezifischen CO₂-Emissionen neuer Personenkraftwagen können dem „Leitfaden über den Kraftstoffverbrauch, die CO₂-Emissionen und den Stromverbrauch aller neuen Personenkraftwagenmodelle“ entnommen werden, der an allen Verkaufsstellen und bei der Deutschen Automobil Treuhand GmbH unter www.dat.de unentgeltlich erhältlich ist.