See also:

Display in the instrument cluster
The selected speed is displayed in the speedometer. ► Green: the system is actively braking the vehicle. ► Orange: the system is on standby. ...

After refilling diesel exhaust fluid
Incorrect fluid Incorrect fluids After refilling with the incorrect fluid, e.g., antifreeze for windshield wiper fluid, do not start the engine because this could result in a fire hazard. ...

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