Sensors, actuators, and electronic controls make repairing Mercedes-Benz doors a lot more important to vehicle safety and passenger comfort than in the past. The collision repair technician must deliver not only excellent fit and finish, but also ensure that all electronics function as required by the original equipment specifications.
Only after ruling out non-compressor problems can you begin testing the variable displacement compressor itself. Does the swash plate respond to different loads? If not, is it a problem with the compressor, sensor inputs, or with the controller?