See also:

Switching on automatically
Select transmission position R with the engine running. ...

Requirements
The installed BMW Assist system is logged in to a wireless communications network. This network must be capable of transmitting the services. To transmit position data, the vehicle must ...

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