See also:

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

Controls
1 Screen, left 2 Screen, right 3 Controller with buttons 4 CD/DVD player ...

Displays in the instrument cluster
Indicator lamp Depending on how the vehicle is equipped, the indicator lamp in the instrument cluster indicates whether the system is switched on. Desired speed ▷ The marking lights ...