See also:

General information
The channels are offered in predefined packages. The packages must be enabled by telephone. ...

Deactivating HDC
Press the button again and the LED goes out. HDC is automatically deactivated above approx. 37 mph/60 km/h. ...

Volume
▷ "Speed volume": speed-dependent volume control. ▷ "PDC": volume of the PDC signal compared to the entertainment sound output. ▷ "Gong": volume o ...