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Clever ventilated tail lights on
the Mercedes-Benz C-Class contribute to the vehicle’s low Cd value
of 0.27 and remove the need for conventional spoiler lips that compromise
styling.
Keen to preserve its large displacement engines, but still reduce fuel
consumption, aerodynamic development is becoming increasingly important
to the OEM.
It is a neat solution that influences the air flow along the side walls
by abruptly redirecting it at the tail lights. Without the feature, the
slipstream would be conducted behind the rear end of the saloon at the
tail lights, causing unfavourable turbulences that can affect the vehicle’s
air resistance, rear axle lift and yaw characteristics.
As the C-Class moves, air is sucked from the underbody and conducted behind
the tail lights to flow out of the small ventilating slits in the lenses.
As the tail lights are hermetically sealed against the vehicle body, the
air is only able to escape to the side via the ventilating slits.
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