See also:

Cruise control
The conceptYou can use the cruise control feature beginning at approx. 20 mph/30 km/h. The car then stores and maintains the speed that you specify using the lever on the steering column. Do not ...

Remove attached parts following use
Remove auxiliary mirrors, roof or rear luggage racks which are no longer required following use. Attached parts on the vehicle impair the aerodynamics and increase the fuel consumption. ...

Activating HDC
Press the button; the LED above the button lights up. ...