2010 Mercedes-Benz R350 BlueTEC, ML350 BlueTEC and GL350 BlueTECAnybody who grew up in the 70s likely remembers the roads crammed with Mercedes Benz 300Ds clattering around the streets. Well, Mercedes is still well into the diesel business, but the game has changed. With the R350 BlueTEC, ML 350 BlueTEC and GL 350 BlueTEC (pictured), Mercedes-Benz has a 50-state legal oil burner that will make you forget everything you ever thought about diesel technology. In many respects the diesels are worth getting not to burnish your green image at the country club, but because they're simply better than the gasoline-powered versions. Don't believe us? Drive one.