Having had this engine in a Mercedes E320 and ML320, make sure you use synthetic oil. There was a large class action lawsuit a few years back regarding MB dealers using regular oil in this engine. The regular oil combined with the LONG oil-change intervals basically ruined the engine. I know -- My E320 was smoking like a diesel at 18000 miles. But I got a new engine out of the deal, so I'm not complaining. Anyway, just a piece of advice since I doubt the Chrysler service people are aware of this engine's history with regular oil.