See also:

Remove attached partsfollowing 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. ...

Vehicle information
Owner's Manual Computer Vehicle ...

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