Mercedes-Benz GLC : Parking Assist PARKTRONIC / Adjusting the volume of the warning tones
Select Warning Tone Volume.
Set a value.
Other information:
..
Press the
button.
The interior air will be recirculated.
Air-recirculation mode automatically switches to
fresh air mode after some time.
If air-recirculation mode is switched on, the
windows may fog up more quickly. Switch on
air-recirculation mode only briefly...