Switching air-recirculation mode on/off
Press the 
button.
button. The interior air will be recirculated.
Air-recirculation mode will switch off automatically.
When air-recirculation mode is switched on, the windows may mist up more quickly. Switch on air-recirculation mode only briefly.
Air-recirculation mode will automatically switch on in the following cases:
in high outside temperatures
while the vehicle is driving through a tunnel (vehicles with THERMOTRONIC automatic climate control and navigation only)
when the wipe-wash function is switched on More
The indicator lamp on the button will not light up in this case. After a maximum of 30 minutes, outside air will automatically be introduced again.