See also:

Brake pedal feel
When the system brakes and you also depress the brake pedal, a somewhat different braking feel results. ...

Switching the system on/off
Switching off At the lowest fan speed, press the left side of the button on the driver's side. Switching on Press any button. ...

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. ...