Looking at a C63. What should I be looking for?

I'm looking at picking up a C63 daily (don't worry, it's not a long commute). I'd like to keep it under 30k, so that's looking like around 60k miles and a 08 or maybe 09. I've been browsing some forums but as far as I can tell there's some kind of head stud issue (that I couldn't tell anything about unless I saw a leak) and basic maintenance. Is there anything else I should look for? I'm pretty mech savvy, and I plan to buy from a dealer, but I obviously can't check internals or anything like that.