Hello, I had reported here about the problem with the central locking (burning the fuse when operating the ZV). I have now had time to disassemble the control of the central locking system and would like to tell you the result or the cause of the fault of the ZV. See also the pictures in the appendix: Picture 1: The control is located in the trunk under the hydraulic pump for the Vario roof. Extension for hobbyists: solve the 4 nuts in each corner of the pump (SW10). Pump for Vario roof high Take off the electrical plugs (2 pieces) and mark pneumatic lines so that they are not switched when installed. Pull off pneumatic lines. The line with the filter is the suction line and does not need to be removed. Figure 2: Extensive ZV control. The control is closed like a tupper can. The lid can be opened by pulling. Figure 3: Inside you can use the circuit board for the control d The pump is nothing more than an electric motor with a housing in which a rotor rotates and creates the air pressure for the locks. Picture 4: Unlock all screws on the head of the pump, remove the lid and you can see the exposed rotor and also the problem: The rotor is smashed!! It blocks the motor, motor works against, pulls more current and fuse burns through. Picture 5: This is how the rotor should look like. Picture 6: So si The rotor is made of a ceramic plastic and is hopelessly too weak for the load. So it has nothing to do with water damage. The control/pump was absolutely dry. Unfortunately, it is hardly possible to get only the rotor, a 50Cent part. At Mercedes the control costs 780€ + control! My car has run a whole 40000Km. And I should now buy a new control for 1000€ every 3 years. Mercedes will buy thisma I receive a letter from me… Greetings Volker