Well, in some cases when cars have come in absolutely Caked w/ gunk I'll run a quart of Risolene in the crank case for a couple of hundred miles... does a good job getting the cleaning process started.. I'll follow that up w/ Rotella or Delo 15/40 oil changed ever 2500 or so miles.. Over the period of a year w/ average mileage the internals will look markedly better!

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