Hydraulic Suspension Valve Units on 2001 Mercedes-Benz S55 AMG

Does anyone know if the HYDRAULIC Suspension Valves on a 2001 S55 AMG are threaded within the Unit or if they have a seal/gasket. Really need to know....

Did you find out the answer to this question? Are these replaceable separately?
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I have the same problem, did you find the answer, I have two parts one the actuator is working the other the body is working. Tell me if you find the answer, I can make one good part with with two