Need advice buying 2012 E350

[tyl604]

Guys - not sure where to post this; I am a diesel guy and that is where I always hang out. My son is buying a 2012 E350. What does 4matic mean? Should I guide him to a 2011 or 2010? Is the 2012 a good year. Have no idea what he should be looking at. He is shopping a pre-owned dealer named Malones in Atlanta and they look pretty reputable to me. Prices are maybe $1-2K below KBB.

RBM is the local new car dealer; I think he should shop them too but he is in a pretty big hurry. I think he will spend about $30K or so.

Advice would be appreciated.