See also:

Checking the coolant level
1. Do not open the hood until the engine has cooled down. 2. Turn the expansion tank cap counterclockwise slightly to allow any accumulated pressure to escape; then continue turning to open. ...

All around the steering wheel
1 Rear window safety switch 2 Power windows 3 Exterior mirror operation 4 Lane departure warning    Collision warning 5 Lamps Front fog lamps Parking lamps ...

Switching on/off manually
Press the button. On: the LED lights up. Off: the LED goes out. If Top View is displayed, switch on the backup camera via the iDrive. ...