Air recirculation function

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. When the air recirculation function is active, oxygen levels are run-down in the passenger compartment. After a while this can increase the relative humidity in the passenger compartment and cause misting. To ensure a sufficient fresh air supply, the air recirculation function is limited to a certain duration (e.g. 15 minutes air recirculation function -> 30 seconds partial fresh-air mode -> 15 minutes air recirculation function -> etc.).

Depending on the series and version, the ambient temperature is also considered for the air recirculation function.

Example:

• at ambient temperatures below 0 C:

  2 minutes air recirculation function -> 1 minute fresh air mode -> 2 minutes air recirculation function -> etc.

• at ambient temperatures of 0 C to 6 C:

  3 minutes air recirculation function -> -1 minute fresh air mode -> 3 minutes air recirculation function -> etc.

• during operation without air conditioning function at ambient temperatures above 6 C:

  4 minutes air recirculation function -> -1 minute fresh air mode -> 4 minutes air recirculation function -> etc.

• during operation with air conditioning function at ambient temperatures above 6 C:

  12 minutes air recirculation function -> -1 minute fresh air mode -> 12 minutes air recirculation function -> etc.

The air recirculation function is activated when the air recirculation button on the control panel is pressed.

This closes the fresh air/recirculated air flap. The refrigerant circuit does not have to be activated.