9. 2014 Mercedes-Benz E250 BlueTEC
Available with a starting price of $52,325, the Mercedes-Benz E250 BlueTEC is powered by a 2.1-liter turbocharged diesel four-cylinder engine with 195 hp and 369 lb-ft of torque. The luxury sedan is rated at 28 mpg in the city and an impressive 42 mpg on the highway. In 4MATIC trim, the E250 BlueTEC’s fuel economy suffers, with a 27-mpg city, 38-mpg highway rating. According to the German automaker, the diesel-powered E-Class sedan hits 60 mph from a standstill in 7.9 seconds.