See also:

Adjusting the volume
Turn the knob until the desired volume is selected. The setting is stored for the remote control currently in use. ...

Sound output
Switching on/off When the ignition is switched off: press ON/OFF button on the radio. Muting When the ignition is switched on or the engine is running: press the ON/OFF button on the radio. ...

2010 BMW X6 Review
Crow tastes better with the right seasoning. After writing a less-than-favorable review of the 2010 BMW 5 Series GT, I had visions of putting Mangus Hirschfield behind the wheel of the 2010 X6 M. B ...