8. 2012 Mercedes Benz 4MATIC ML 350 BlueTec
Combined miles per gallon: 23.3
It's about $1,000 more than the standard version, but the turbodiesel engine is four miles per gallon better while hitting the same 0-to-60 times (7.3 seconds). That's about the only area where the ML350 exercises restraint. A heated leather steering wheel, heated seats, dual climate control, an entertainment center with a 7-inch LCD screen and in-dash memory card reader are just some of the toys that come with the sale price.