GM Part # 12345501. Only available in 4oz containers. I use 1 & 1/2 containers per change (given we run a good bit more oil then domestic cars).

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