Originally Posted by CCL
How do you turn Hill-start assist on? My X3 was rolling down as if I was driving a manual car.
Nahoa is correct, it is constantly on, the car should detects that you are on an uphill.
Maybe in your case, the inclination was not steep enough to trigger the hill-start assist sensor? You can tell if hillstart assist is activated if you lift off the brake pedal on an incline (with auto hold feature turned off) and press it again, the pedal will be stiff as if the auto hold is on.