IME, there is more crap in the aftermarket then quality, useful parts.

As for the fan clutches, given the $$ I've begun swapping cars over to electric fans..cheaper, reliable, and they free up HP

Jonathan

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Blue Ridge Mercedes
Jonathan Hodgman
http://www.blueridgemb.com/
Enthusiast Service, Restoration & Tuning.
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Located in the Atlanta area
Specializing in all pre and post merger AMG's including Hammers and DOHC M117 engines.
Mercedes Repair Atlanta