2009 Mercedes-benz 5.5l Amg on 2040-cars

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Why it's difficult to accurately test the efficiency of a plug-in car

When it comes to electric vehicles and plug-ins in general, the Environmental Protection Agency-certified range is a hugely important number. While actual range anxiety is largely psychological, the magic number does provide a point of comparison of buyers considering one EV over another. The driving distance is also often touted by automakers when marketing their models. Unfortunately, as Green Car Reports finds in a recent deep dive, the way the EPA calculates the figure is a convoluted mess, and discovering the reasons why is definitely worth the read. The issue isn't about bad science but instead comes down to vague wording. The EPA's accepted range test is sourced from an evaluation called J-1634 from the Society of Automotive Engineers, and it seems to provide balanced results for vehicles that automatically reach a single state of charge when plugged in. However for models with multiple charge settings, the situation gets complicated very quickly. Of course, these modes are often created in the software, meaning that a car's certified driving distance can change with just a few taps of the keyboard without the real world results owners might experience actually changing. By showing the test's effects on the certified range for the Tesla Model S, Nissan Leaf and Mercedes-Benz B-Class Electric Drive over the last few years, Green Car Reports makes a compelling argument that it's the evaluation that needs to change. Thankfully, it appears that the solution is a very simple one. Get the details here.

Mercedes-Benz previews its curvy sports-car and design future

Suggesting creases are passe for automotive design, Mercedes showed off ideas for its future styling directions this week at a forum in Germany, including previews of upcoming sports cars and sedans. We see images of a curvy sports car study (the silver car) with huge wheel arches flared out almost like pontoons. There's also what appears to be a rear-engine hypercar (white car); we've been reading reports about it for months. Additionally, there's a red sporty saloon, as Mercedes calls it, also among the photos. It features prominent rounded fenders and a bold horizontal grille. Mercedes also previewed its upcoming A-Class, in what it calls the Aesthetics A sculpture, which looks like a car covered in a red sheet. Though Mercedes says this is its next step to a purer design, creases and strong lines are still evident on the sides. Related Video:

Mercedes caught testing stretched E-Class Maybach

The Mercedes-Maybach S600 won't be the only vehicle to wear the hyphenated name of two of the world's automotive luxury greats. That hulking S-Class will soon be joined by an E-Class variant, which should offer the same touch of subtle luxury as its big brother. At least, that's what we're guessing based on the latest round of spy photos, showing a stretched E-Class with some very telling camouflage. Pay attention, as our spies did, to the rear doors and C-pillar. Like the Maybach S600, the E-Class model features a larger quarter window, although unlike the S, the doors here look to be a bit larger than your usual E550 or E250. Also take note of the heavy tint on those rear windows. It's likely there to obscure whatever sumptuous hides and warm woods Maybach has fitted to the typically business-class interior. While the interior materials are likely to see sweeping changes, expect Mercedes to treat the exterior with a much gentler touch. There'll probably be some unique wheels and C-pillar-mounted Maybach badges, like what we've already seen on the S600. Check out the full round of spy photos up top, and stay tuned for more on the latest Mercedes-Maybach. Related Video: