See also:

BMW 7 Series Owners Manual
h4 {color:#800000} h3 {color:#0033CC} h2 {color:#008000} h1 {color:#FF0000} ...

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

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. ...