Thanks for the reply, by box on fender do you mean the one with the two relays on the drivers side or the one with 3 big cables on the passenger side. The burn mark was really small and it was just on the paper with the part number. I hooked up a cable with staight power to the powerside of the fuse and now climate control works when running. The compressor works so my a/c might even work.

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1974 240d
1983 240d -sold
1989 420sel with om606
1994 s350 turbodiesel - sold