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. ...

Deactivating HDC
Press the button again and the LED goes out. HDC is automatically deactivated above approx. 37 mph/60 km/h. ...

Data transfer
The status of the data transfer is displayed. 1.  "BMW Assist" or "ConnectedDrive" 2.  Open "Options". 3.  "Data transfer" ...