This is the most-efficient version of Mercedes' elegant and accommodating midsize E-Class sedan, and it leverages its 3.0-liter turbodiesel V-6 engine for V-8-grade off-the-line acceleration with 210 horsepower and a generous 400 pound-feet of torque. A seven-speed automatic transmission shifts smoothly and efficiently. Buyers can upgrade the base comfort-oriented suspension to a sport package for improved handling and specific upgrades at no difference in price, which starts at just over $51,000. It's rated at 22/33 mpg.
