Ventilation system function

P83.00-2180-76

Function

The ventilation system prevents windows from misting up, provides oxygen to the occupants and ensures that uniform and pleasant temperatures in the interior are reached quickly.

In the normal mode, when the vehicle is stationary or in order to increase the air flow, the ventilation of the interior is achieved with assistance of the blower. Fresh air is drawn into the AC housing via the air inlet in the engine hood and via the fresh/recirculated air flap (fresh air position).

Depending on preselection on the AAC [KLA] control and operating unit (N22), the air is directed through air ducts to the interior via air outlets. In the air recirculation mode, air is drawn out of the vehicle interior through the fresh air and air recirculation flaps (recirculated air position) and blown into the A/C housing.

In order to prevent the windows from fogging up, the defroster flaps as well as the air recirculation flap are closed and the footwell flaps opened completely 2 min after switching off the ignition. After starting the engine, the defroster flaps and footwell flaps remain in this position for 30 s. The air recirculation flap is immediately adjustable.