And here are the active aerodynamic measures at a glance:
· The retractable tail-end extension in a “boat-tail” design is the most spectacular. At the same time, this modification has the biggest influence on the improvement to the cd value. Together with the diffuser, the extension, which is extendable by up to 390 millimetres, ensures that the air flow hugs the vehicle more closely and that the after-flow zone behind the vehicle’s tail end is substantially smaller. This results in a considerable reduction in drag. The rear extension consists of eight segments produced in CFRP in a sandwich structure which extend to form a closed ring.
· From the sporty 5-spoke wheel to the aerodynamically exemplary rim – this visual transformation is achieved by the Active Rims. With the help of centrifugal force they reduce their classification from 55 to 0 millimetres.
· In the front bumper, what are known as the front flaps sit on the sides in front of the wheel arches. In the aerodynamic mode they move 25 millimetres to the outside and 20 to the rear up to the rear edge of the wheel crescent. This substantially improves the inflow of air to the wheels and the flow of air over the front wheel arches.
· On the front side of the bumper there is a slat at the bottom. It moves 60 millimetres backwards and improves the flow into the underbody.
In addition to this there are numerous further aerodynamic optimisations such as discs flush with the outer edge of the body, no door openers, lowering, extensive underbody panelling plus an adjustable radiator grille shutter.
So there’s much spin about the wind, but the result is impressive: with its dynamic form (“drop shape”), the puristically elegant overall design plus the numerous technical innovations the four-door coupé saloon is “a symbiosis of desirable forms which intelligently showcase aerodynamics”, stated Gorden Wagener, Head of Design.