See also:

System self-test
After you have switched on the ignition, the system carries out a self-diagnosis. WARNING   A malfunction in the system has been detected if one of the following conditions occurs: • t ...

Additives
Do not use any additives in the engine oil. This could damage the engine. ...

Initiating point of interest entry
To activate navigation mode: press the function button once or twice. To show the menu: press the COMAND controller. Select Destination in the navigation system menu bar by turning ...