Operation CHARM: Car repair manuals for everyone.

Ventilation








Represented with automatic air conditioning






Represented with rear air conditioning


Function
The ventilation system
- keeps the windows from fogging up
- provides oxygen for the vehicle passengers
- helps to achieve a uniform and pleasant temperature in the passenger compartment rapidly.

In normal operation, ventilation is accomplished with the support of the blower when the vehicle is standing still or to increase the air flow rate.
Fresh air is sucked in through the air intake in the engine hood and through the main air flap into the automatic A/C housing. The air travels through the air ducts to the air outlets into the passenger compartment depending on the settings on the pushbutton control module.
In the recirculated air mode, air is sucked out of the vehicle interior by the fan through the recirculated air flap (main air flap is closed) and delivered into the automatic A/C housing. The air flows through the nozzles below the rear shelf into the trunk and out of the vehicle through the rear compartment nozzle.

On vehicles with rear air conditioning (code 582) the air required for cooling the rear compartment when the rear air conditioning is switched on is sucked only out of the vehicle interior.
A separate blower is located in the rear air conditioning housing for sucking in the air.
The air flows through the rear compartment nozzle and/or air outlets in the rear footwell into the rear passenger compartment depending on the settings on the rear air conditioning pushbutton control module.
The air flows through nozzles below the rear shelf into the trunk and out of the vehicle through the rear compartment nozzle.