See also:

Activating HDC
Press the button; the LED above the button lights up. ...

General malfunctions
▷ CD/DVD changers and players have been optimized for performance in vehicles. In some instances they may be more sensitive to faulty CDs/DVDs than stationary devices would be. ▷ ...

Tilting the glass sunroof
Push switch upward briefly. ► The closed roof is tilted and the sliding visor opens slightly. ► The opened roof closes until it is in its tilted position. The sliding visor stays ...