I took the car for a spin and in the beginning it was all promising, cold air, ahh.
But soon the compressor was cut off and never came back. I restarted and... same thing. I am frustrated right now but maybe I need to get a new Klima relay from the 1990 300 D 2.5 ? in order to keep this compressor going.
Well the compressor never gets cut off when the engine is idling. So it must have something to do with the fact that the car is moving?