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. ...

BMW Maintenance System
The maintenance system directs you to required maintenance measures and thereby supports you in maintaining road safety and the operational reliability of the vehicle. ...

Activating/deactivating Bluetooth
Bluetooth is not permitted everywhere. Comply with all safety guidelines and regulations. 1. "Telephone". 2. "Options" Open. 3. "Bluetooth®" ...