See also:

Calls with multiple participants
General information You can switch between calls or connect two calls to a single conference call. These functions must be supported by the mobile phone and service provider. Accepting a call ...

Tone
The sound settings are stored for the remote control currently in use. ...

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. ...