Recirculated-air mode

In the recirculated air mode, in the event of a high pollutant load, e.g. in a traffic jam, the supply of fresh air can be blocked. The air in the vehicle interior is permanently recirculated. With recirculated air mode, the oxygen in the vehicle interior is used up. Furthermore, in the recirculated air mode the relative humidity in the vehicle interior can increase, which can lead to fogging over.

To ensure adequate fresh-air supply, the recirculated air mode has a time limit (30 min recirculated air mode -> 30 s partial fresh-air mode -> 30 min recirculated air mode -> etc.).

The recirculated air mode is activated as follows:

• the recirculated-air button on the operating unit is pressed
• AUC detects an ambient condition

The fresh air recirculated-air flap is closed. The refrigerant circuit is not force-activated. The recirculated air mode is saved before the idle state of the control module is reached, i.e. the function is activated after a reset.