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GREEN | 7 out of 10
2014 Mercedes-Benz E-Class: Not yet rated
Stop/start is here too, and it's not the fig leaf you'd think, even if it starts the E63 AMG in second gear when the tranny's in comfort/economy mode and thwaps the drivetrain to life with a mini-riding crop.
The Mercedes-Benz E-Class is one of the few vehicles that covers all of the most commonly available engine types. It's powered by gas, by a combination of gas and electricity, and by diesel, with the latter two drivetrain options delivering the top estimated fuel economy.
The EPA hasn't yet published U.S. ratings for the 2014 E-Class, but in most cases, the 2013 figures should be close to the new numbers, if not identical--except in the case of the new turbodiesel four, which replaces the larger-displacement turbodiesel V-6.
Last year's E350 sedan was rated as highly as 20 miles per gallon city, 30 miles per gallon highway, or 23 mpg combined. Stepping through the all-wheel-drive versions of the four-door and wagon, and the two-door coupe brought mileage down to 19/27 mpg, or 22 mpg combined in the AWD wagon. The E550 sedan checked in with 16/26-mpg gas mileage.
The high-performance E63 AMG models were rated as low as 15 mpg city, 23 mpg highway, but those numbers didn't factor in the added weight of all-wheel drive, or the increase in power available this year.
We do expect the E400 Hybrid to carry over its 24/30-mpg ratings, since it's essentially carried over. However, we only have some guidance on the new E250 BlueTEC: given that last year's E350 BlueTEC earned 22/32-mpg fuel economy numbers, it's a good bet the new turbo four-cylinder diesel will hit 35 mpg on the highway cycle.
We'll update this section as new information becomes available.
Both a diesel and a hybrid edition give a green lift to a lineup heavy with near-600-horsepower V-8s.