See also:

Remove attached parts following use
Remove auxiliary mirrors, roof or rear luggage racks which are no longer required following use. Attached parts on the vehicle impair the aerodynamics and increase the fuel consumption. ...

Switching on/off
Press the button. ...

Controls
Controls 1. Press: switch the DVD system on/off Turn: left headphone volume and vehicle volume 2. Eject CD/DVD 3. Beginning of track     Stop     Play ...