Steve - my weak spot is the electronics stuff. I have put a jumper between 7 and 10 on my Klima and now my a/c climate control system works like it is supposed to. Based on the way I understand the schematic I have bypassed the Klima by doing this. Is this right? My application is the 1985 300D and I think all the Klima does in this application is drop out the compressor during full throttle.