oil grade
4 Answers
If I remember it's a heavier weight oil 10-40 or 20-50, but I'm likely mistaken so wait till someone with more knowledge responds or call a MB dealership.
go to someplace like grease monkey or jiffy lube. they can look it up in the computer.
If you give your registration number to any part's supplyer they should be able to look it up for you. Think it's 10w/40 tho
Go to this link to download one! http://www.mybenz.org/zoopp/html/modules/newbb/viewtopic.php?topic_id=7341&forum=21