ok now you need to check the engine fan clutch.with car warmed up and idling and a/c on take a shop rag or towel and gently touch the inside[engine] of the fan blade and see if you can stop it.if you can it's new fan clutch time.

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David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
http://www.w108.org/gallery/albums/A...1159.thumb.jpg