After screwing around with the Klima on my 126 3.5L diesel for a few weeks a few years ago ... turned out it was the OVP which had fallen apart inside the relay case ... after reading for days on OVP and Klima, I think Klimas get a bad rap - statistically, at least.

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George Stephenson
1991 350 SDL (200K and she ain't bent, yet)
former 2002 E320 4Matic Wagon - good car
former 1985 300 CD - great car
former 1981 300 TD - good car
former 1972 280 SEL - not so good car
a couple of those diesel Rabbits ...40-45 mpg