See also:

Adjusting the volume
Turn the knob until the desired volume is selected. The setting is stored for the remote control currently in use. The vehicle automatically adjusts the volume of the microphone on the telephone ...

The concept
The parking brake is primarily intended to prevent the vehicle from rolling while parked; it brakes the rear wheels. ...

Switching the interior lamps on and off
Switching the interior lamps on and off Press the button. To switch off permanently: press the button for approx. 3 seconds. To clear this setting: briefly press the button. ...