or on a hydraulic component connected to it the pressure detected by the pressure sensor 28 is forwarded to the control unit 1 which has evaluation means that from the characteristic change in the pressure the pressure begins to rise steeply find that the clutch part has reached the stop simultaneously via the distance detection the control unit has information about the instantaneous regulating distance of the actuator final control element 24 at that time by means of the information present in the control unit 1 the control unit can for instance compare the course of pressure and regulating distance stored in memory with the actual course of pressure and regulating distance detected via the distance detector 30 and the pressure sensor 28 and ascertain a deviation plausibility test if a deviation occurs then for instance the characteristic curve used for triggering the actuator can be corrected in accordance with the actual values as a result it is attained that in future actuations by means of triggering of the actuator 2 the clutch can be set to defined states since the corrected characteristic curve has been adapted to the varying hydraulic distance boost in a further exemplary embodiment however it may also be provided that instead of the pressure of the hydraulic system a trigger signal of the actuator is monitored for instance the current intensity through the electric motor 21 of the actuator 2 can be monitored by providing means suitable for this on the actuator or in the control unit upon contact of the clutch part 47 with the stop 40 a characteristic increase in the current then occurs on.