Found 0-w-40 at Walmart, bought my own Topsider Oil-pump, and followed some of the other post here for directions on doing an oil & filter change. Changing the oil is easy w/ the topsider, no mess. The M-B dealer wouldn't allow a Chrysler on the lot for service, not even for an oil change. Service manager was a "&%^*. The parts guy was helpful with the filter ($21). He admitted to me in a whisper that I had the better car then the SLK, better looking and with nicer wheels.

Do it yourself, Its easy thanks to this great forum...

It did take me two tries to reset the FSS though.