A locking mechanism for latching a convertible top to a cross-member of a windshield frame of a vehicle. The teat cup holder is tiltable, via a tilting mechanism coupled to the teat cup holder and the frame between a substantially vertical position and a second partially inverted position. A cleaning device, which is detachably connected to the conveyor chain, is allocated to at least one end of the finite conveyor chain. An actuator arm is also provided. If a metric is cumulatively used with an encoding process, the probability of remaining bit errors in the whole method can be significantly reduced, thus making it possible to use the method in automation technology.