http://www.k6jrf.com/MB_S500.html

Follow directions on his site.

I'll wager you have have in issues in one of more of the following: harness, ETA, cap/rotor, MAS, O2...

How many miles?

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