See also:

Adjusting the volume
Turn the knob during an announcement. The volume remains constant even if the volume of other audio sources is changed. The volume is stored for the remote control currently in use. Not ...

Safety switch for the rear
Press the button on the driver's door if children are being transported in the rear. This locks various functions so that they cannot be operated from the rear: safety switch. ...

Deactivating HDC
Press the button again; the LED goes out. HDC is automatically deactivated above approx. 37 mph/60 km/h. ...