My Klima went south. The circuit is too complicated to repair without a schematic. I just cut all the functions and simply use a relay to monitor the signal from the CCU on pin 10. It works well, I have protection on the freon level but I would like to monitor the compressor rpm as well.

I have access to a number of gas Klima but they do not work on the SDL. It fits in the socket alright but nothing happens. Any idea?

Has anyone managed to modified one for a diesel. I do not care about the other monitoring points but would like to check the compressor's rpm is OK + freon level.

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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.