A motor vehicle window regulator in which a matrix coating is applied to a metal blank. The controller is comprises of a deterioration recognition section for recognizing a deterioration state of the engine or the actuator during the spark-ignited combustion. The terminals can be allocated one or more timeslots in frames. These InGaAlP-based layers are grown epitaxially by Organometallic Vapor-Phase Epitaxy on a GaAs substrate with a misorientation angle toward <111>A to improve the quality and surface morphology of the epilayer and performance in light emitting. The contact assembly includes an ultraviolet light source.