Thanks everyone, I forgot to update my post. After doing a more thorough search I ended up changing with Mobil 1 European Forumula 0W40 and a dealer filter. It's an '08 with only 21K on the clock, but I didn't get any records with it. So I changed the oil just to be safe.

As for the manual, I ended up searching and finding that free online at MBUSA.com. I've been studying it to figure out how to use the NAV, iPod connector, etc.

Thanks everyone for your help!

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280