See also:

The concept
The iDrive combines the functions of a multitude of switches. Thus, these functions can be operated from a central location. ...

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

Switching the microphone to mute
When a call is active, the microphone can be muted. 1. "Telephone" 2. "Active calls" 3. "Microphone mute" A microphone that has been switched to mute is automatic ...