The 2010 Mercedes-Benz R-Class is a six-passenger luxury car that straddles the line between a minivan and a wagon, and it does so very stylishly. Two trims are available; the R350 with a traditional gas engine and the R350 BlueTEC which utilizes diesel for more power and greater fuel economy. The gas version is powered by a 3.5L V6 which produces 268 hp. The BlueTEC trim has a 3.0L turbodiesel V6 under the hood which generates 210 hp/398 lb-ft of torque and is rated at 24 mpg on the highway. Both are mated to a seven-speed automatic transmission and the 4MATIC all-wheel drive system.