See also:

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. ...

Using BMW TeleService
BMW TeleService are typically activated in the vehicle. Even if the BMW TeleService are not active, a voice contact to Roadside Assistance is still possible. To continue using or to deactivate ...

Reference
This chapter contains technical data, short commands for the voice activation system, and an index that will quickly take you to the information you need. ...