Be careful what you buy these days. Diesels 2008 or older are much less complicated. The newer ones are all DEF after the EPA went after diesel. Most end up in the shop twice a year.
I am leaving a 2009 Mercedes diesel getting 18MPG (24' LTV) 123,000 miles and going to gas in a 2015. Cannot buy a new diesel after DEF. Check with the mechanics who work on them, they will tell you DEF is a disaster for class 8 trucks to Sprinters.
I am going to miss my 18 mpg to be lucky to get 8, but gas is the way for me now after trying to find places to work on diesels and getting the work done reasonably.
