See also:

2012 BMW 650 review
One of the greatest leaps in automotive progress this past decade has been the taming of the convertible. Once requiring a tradeoff — open-air enjoyment versus performance and year-round comfort — ...

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

After the ignition is switched off
The roof can still be operated for approx. 1 minute, as long as no door has been opened. ...