S 55 AMG (220.174) V8-5.5L SC (113.991) (2004)
Air Door Actuator / Motor: Description and Operation
Vacuum Element For Defroster Nozzle Flap
Purpose
The defroster vent flap actuator motors actuate the defroster vent flaps to control the airflow to the windshield defroster nozzles and side window
defroster nozzles separately for the left and right sides.
Function