See also:

Note
If equipped with Business mobile phone preparation equipment package or without mobile phone preparation. ...

Adjusting the volume
Turn the knob until the desired volume is selected. The setting is stored for the remote control currently in use. The vehicle automatically adjusts the volume of the microphone on the telephone ...

Switching on automatically
Select transmission position R with the engine running. The Top View and PDC images are displayed if the system is switched on via iDrive. ...