The coil on my compressor clutch is shorted, so I need to replace the clutch assembly. My mechanic says it's best to replace the entire clutch assembly vs. just the coil. Where is the most economical, trust worthy place to buy a clutch assembly? 1988 420 SEL. Compressor part number 000 230 25 11 88. I'm checking MercedesShop. Where else? Also need to replace the Klima relay. do I have a chance of repairing this relay, or should I just buy new. I have to save $, if at all possible (and don't we all).