As a new model for 2009, the Mercedes-Benz R320 BlueTEC clean-diesel crossover features a new AdBlue exhaust treatment system that delivers as much as 30 percent better fuel economy than traditional diesel. The roomy SUV also boasts a cruising range of more than 500 miles at highway speeds. So far, it has proven to be the greenest chauffered sedan available. The vehicle's base model retails for $47,650.
For an in-depth review of the R320 by LCT editor Martin Romjue, read Limo Vergnugen: LCT Reviews the Mercedes-Benz R320.