The E-Class represents the middle range among Mercedes-Benz sedans: larger than the entry-level C-Class, but more trim and practical than the imposing S-Class. Nonetheless, today's E-Class is as big as an S-Class was in the 1970s. The E-Class sedans are big, roomy cars that are solid, safe, practical, comfortable, luxurious, and fast. The E-Class features some of the industry's most advanced safety technology, and it expresses what most people think of when they think of Mercedes: status in an elegant, understated fashion.

Yet the cost of operating the popular Mercedes E350, in terms of fuel consumption and maintenance, can be quite reasonable. And there is no better example of how far passenger car diesel technology has advanced than the Mercedes E320 Bluetec. With its advanced common-rail direct-injection turbodiesel engine, the E320 Bluetec accelerates from 0 to 60 mph in just 6.6 seconds, while delivering EPA-estimated fuel mileage of 23/32 city/highway mpg, and producing minimal exhaust emissions. The Mercedes-Benz E320 Bluetec was named World Green Car at the 2007 New York International Auto Show, and NewCarTestDrive.com chose it as one of its Best Commuter Cars that same year.