See also:

Operation
Adjusting the volume Turn the knob until the desired volume is reached. The setting is stored for the remote control currently in use. The vehicle automatically adjusts the volume of the microphon ...

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

Exporting/importing contacts
Contacts can be exported and imported via the Personal Profile.  The contacts stored in the vehicle are exported, but not those from the mobile phone. ...