Electric Car Benefits mercedes-b-class-electric

Published on July 10th, 2014 | by Chris Demorro

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Mercedes B-Class Electric Nets 87 Mile Range, 84 MPGe

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July 10th, 2014 by Chris Demorro
 

mercedes-b-class-electricThe Mercedes B-Class electric is engaged in a range war with the likes of the BMW i3, its arch EV rival. There has been plenty of speculation as to the exact EPA MPGe and range rating, though Green Car Reports says it has confirmed the ratings.

According to the EPA, the Mercedes-Benz B-Class Electric Drive can go up to 87 miles per charge, and received a 84 MPGe rating. That gives it about 6 more miles of driving range that the BMW i3, but it falls far short in comparable efficiency, with the i3 rated at 142 MPGe. We doubt this includes an optional “range extender” that adds up to an extra 17 miles of driving range in case of emergency, bringing the total potential range to over 100 miles.

How can two cars with such similar driving ranges have such different efficiency ratings? It comes down to battery size, with the B-CLass boasting a larger 36 kWh battery. However, only 28 kWh are actually usable with the other 8 kWh serving as a buffer against “bricking” the battery or wearing it out prematurely. The extra battery therefore doesn’t add much range, but it does add a lot of weight, leading to a lower range rating compared to the BMW i3, which can go 81 miles with just a 22 kWh battery. That’s because the i3 weighs a whole lot less thanks to its carbon fiber architecture…and I’d like to think the fact that it’s rear-wheel drive helps too.

Unfortunately for Mercedes, despite the fact that the B-Class Electric is powered by a Tesla drivetrain, it’s definitely the underdog in the contest of electric cars thanks to its limited range and low efficiency, and it’s easy to predict that it won’t sell as well as the other contenders in the market.

 

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About the Author

A writer and gearhead who loves all things automotive, from hybrids to HEMIs, can be found wrenching or writing- or esle, he's running, because he's one of those crazy people who gets enjoyment from running insane distances.



  • http://neilblanchard.blogspot.com/ Neil Blanchard

    I was hoping for a bit more from this car. The first affordable EV to hit 125 miles range (or 150 or 175, it goes without saying!) will be a winnah’ !

    I am curious to find out how the Mercedes B-Class Electric does with the switchable regen. Free wheel coasting will add a fair bit of range. So, hopefully we get an in-depth review, soon.

    • Offgridman

      “the first affordable EV to hit the 125-175 mile range will be a winnah!”
      Well no claims to affordability but the GM EV-1 was doing that ten years ago at a decent lease price. The real question is why the big manufacturers aren’t matching the mileage numbers of Tesla the little startup with their supposed scales of quantity. Politics, undue influence by the fossil fuel companies? I have no idea, but do wish more people were questioning this so the truth could come out.

      • http://neilblanchard.blogspot.com/ Neil Blanchard

        Right – if the Leaf had the aerodynamics of the EV1, then it would already have 125-140 mile range. And it would cost the same as it does now, because the battery pack would be the same.

  • danwat1234

    The i3 range extender can provide far more than just 17 miles before having to fill up the gas tank. In the USA it hold 1.9 gallons so that is 60+ miles. And it’s not just for emergencies. No limit

    The i3 is NOT 143MPGe, but 137 city, 111 highway, 124MPGe combined. The Rex version, which has the onboard generator has a bit less MPGe.

    Is the Mercedes really only 84MPGe? That’s worse than the Model S while weighing quite a bit less and less acceleration. You pay for the nose of the car I guess.

    AUTHOR, please check your facts a bit better…

  • danwat1234

    The i3 range extender can provide far more than just 17 miles before having to fill up the gas tank. In the USA it hold 1.9 gallons so that is 60+ miles. And it’s not just for emergencies. No limit

    The i3 is NOT 143MPGe, but 137 city, 111 highway, 124MPGe combined. The Rex version, which has the onboard generator has a bit less MPGe.

    Is the Mercedes really only 84MPGe? That’s worse than the Model S while weighing quite a bit less and less acceleration. You pay for the nose of the car I guess.

    AUTHOR, please check your facts a bit better…

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