The newest Mercedes-Benz E-Class – the 2014 E250 BlueTEC sedan – has achieved an impressive estimated EPA rating of 45 miles per gallon on the highway and 28 mpg around town. The first diesel E-Class to be available with 4MATIC achieves best-in-class fuel efficiency for a midsize luxury sedan and for the entire industry in the same size range.
When equipped with optional 4MATIC all-wheel drive, its fuel mileage numbers are still an impressive 42 mpg highway and 27 in the city. No other diesel sedanOFFERS a better EPA fuel economy highway estimate.
High-Tech Four Cylinder with Balance Shafts
It’s clear that the big news for 2014 is the high-efficiency turbodieselENGINE that powers the E250 BlueTEC. The all-aluminum, in-line four-cylinder engine makes use of four valves per cylinder and dual overhead camshafts with vane-type variable valve timing, producing 195 hp and 369 lb-ft of torque.
To smooth out the inherent vibration of an in-line four-cylinder engine, two Lanchester balance shafts spin at twice crankshaft speed in sophisticated, lowfriction roller bearings. During normal operation, the advantages of this two-stage turbocharged system can be felt – no turbo lag, fast throttle response, a broad torque curve across the entire engine speed range and noticeably improved performance. What’s more, the 369 lb-ft of torque is readily available at 1,800 rpm.