Diff oil really should be swapped every 50-06K to keep things looking nice inside.

Just the two drain plugs is all...drain is rear pass side, fill is on drivers upper/middle of the side of the case.

I like Redline/Lubro Moly/M1 syn. diff oil...works great in all my cars and they get a Work out!

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