See also:

What to do if...
Only a black screen is visible. Switch on the system. There are no options available on the screen. Switch over between the display screens. Radio stations or TV channels are grayed out ...

Automatic Hold
The concept This system assists the driver by automatically setting and releasing the brake, such as when moving in stop-and-go traffic. The vehicle is automatically held in place when it is st ...

Deleting all stored programs
Press both outer memory buttons 1 for approx. 20 seconds until the LED flashes rapidly. All stored programs are deleted. The programs cannot be deleted individually. ...