See also:

Functional readiness of the airbagsystem
When the ignition is switch on, the warning lamp in the instrument cluster lights up briefly and thereby indicates the operational readiness of the entire airbag system and the belt tensioner. ...

Switching on/off manually
Press the button. On: the LED lights up. Off: the LED goes out. The PDC is shown on the Control Display. Switch on the backup camera via the iDrive. ...

Brightness
Setting the brightness To set the brightness of the Control Display: 1. "Settings" 2. "Control display" 3. "Brightness" Brightness" 4. Turn the controller un ...