Stepper Controller

The stepper motor controller is mounted on the side of the bi-xenon headlight and controls/ monitors the movement of the stepper motors for the adaptive headlight and the vertical aim control function.

The component can be replaced, however after replacing the stepper motor controllers, it is necessary to store the vehicle identification number and enter headlight related coding in the stepper motor controllers.

The complete adaptive headlight function will not be operative without this adaptation. Particular care must be taken when replacing the stepper motor controllers to ensure that the housing gasket of the stepper motor controller is fitted and seals correctly.