See also:

Switching on/off
Press the button. ...

Multi-channel playback,surround
Choose between stereo and multi-channel playback, surround. Setting multi-channel playback, surround 1. "CD/Multimedia", "Radio" or "Settings" 2. "Tone" 3 ...

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