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2014 Mercedes E250 BlueTEC Sedan

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The Mercedes E250 BlueTEC sedan is powered by a 2.1-liter, inline, four-cylinder engine. A turbocharged diesel engine. The engine produces 195 hp @ 3,800 rpm and 369 lb-ft of torque at 1,600 to 1,800 rpm.


More interesting, perhaps, for those who are keen on diesel technology, is the fact that the rear-wheel-drive sedan gets an estimated 28 mpg city, 45 mpg highway. So that averages out to 34 mpg, combined.

The E250 BlueTEC has a 21.1-gallon fuel tank. (It also has a 7-gallon tank that carriers the AdBlue solution, which is injected into the exhaust gas for the selective catalytic reduction process, which is aftertreatment for the exhaust, which means that nitrogen and water are created in a downstream catalyst. All of which is to say that this is a “clean diesel”: you’re not going to have a nasty smell or blue smoke coming out of the tailpipe.)

Now assuming that you’re getting 34 mpg, this means that with that 21.1-gallon tank, you’re going to have a range of some 700 miles. Which means that you’re going to be able to go from Florida

Into the mountains


Across bridges


Through a field (why?)


And into a parking garage


You’ll have plenty of range. And you’ll ride in comfort.

To get the most out of your diesel fuel, you can engage the “Eco” setting. One of the things that activation of that results in is that when conditions are right, when the car is stopped (say, at a traffic light), the engine is shut off. The HVAC system still works. The radio still plays. But the engine stops burning diesel. You will, of course, notice this. But you won’t notice it because there is a direct fuel injection system pumping fuel into the cylinders at 2,000 bar (that’s 28,400 psi)—the engineers at Mercedes have made this engine smooth and quiet (in part by using two Lanchester balance shafts, which spin in roller bearings at twice the crankshaft speed, which have the result of making the in-line four, well, balanced). No, you’ll notice it because quiet though it is, it is still creating noise when running, and when it isn’t running, there is an absence of that noise.

You’ll also notice it because when it restarts, you’re in for a surprise. I’ve driven plenty of cars with stop-start systems. But all of those cars have gasoline engines. I don’t know if it has something to do with the nature of compression combustion vs. spark combustion, but there is a noticeable difference on the diesel restart. You know it is restarting. Of course, if you’re the sort of person who wants to eek out as much fuel economy as you can, you don’t care about that. If you’re not, you can simply deactivate the system and probably burn a few extra ounces of fuel.

The styling of the E Class is certainly more expressive than the previous model. The interior has a fresh, restrained appearance; this is, after all, . From the point of view of the infotainment system, I think that the guys in Stuttgart ought to spend a little time trying to figure out what the guys in Ingolstadt are doing, because there is a discernable difference, and not in the favor of Mercedes (especially as regards the interface for the radio tuning; it brings one of those Grundig multi-band radios to mind).

The navigation interface is clean and accessible. Which is probably a good thing if you’re going to take advantage of how far you can go.

Selected specs

Engine 2.1-liter, DOHC, I4, turbocharged diesel

Horsepower: 195 hp @ 3,800 rpm

Torque: 369 lb-ft @ 1,600 to 1,800 rpm

Materials: Aluminum block and head

Transmission: Seven-speed automatic

Steering: Electromechanical power-assisted rack and pinion

Wheelbase: 113.2 in.

Length: 192.1 in.

Width: 73 in.

Height: 57.1 in.

Curb weight: 4,409

EPA: 27/38/31 mpg (city/highway/combined)



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