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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 moves R-Class production to AM General in Indiana

Go back a decade or two and you'd have seen the SUV market polarizing in opposite directions: hard-core off-roaders like the Hummer on the one hand, and passenger-focused crossovers like the Mercedes R-Class on the other. Now their fates are set to intertwine, at least as far as manufacturing is concerned. No longer producing Hummers, AM General (which designed and originally produced the Hummer) has been assigned the task of manufacturing the R-Class at its underused, 675,000 square-foot Commercial Assembly Plant in Mishawaka, IN – part of metropolitan South Bend. The decision was undertaken to allow Mercedes to free up production capacity at its plant in Tuscaloosa, AL, where it also produces the M-Class, GL-Class and C-Class, and where it will soon begin manufacturing the GLE Coupe. The vacation of the R-Class assembly line could be earmarked to make room for that new slant-roofed crossover (which was originally thought to be joining the Tuscaloosa plant as a fifth model) or could pave the way for another model to reach Alabama altogether. The multi-year arrangement to manufacture the R-Class makes AM General the first manufacturer contracted to build Mercedes-Benz vehicles in the US, but hardly the only one in the world. The G-Class – which could, incidentally, be characterized as the German equivalent of the Hummer – is built on Mercedes' behalf by Magna Steyr in Austria, and the company builds many of its passenger and commercial vehicles for local consumption under joint ventures in the Far East especially. The R-Class was first introduced in 2005, and though it's still built in America, it was removed from the company's US lineup back in 2012. However Mercedes confirms that, since 2013, it has been and remains available exclusively in China. That puts the R-Class in the rare position of being manufactured in the United States by (or now for) a foreign automaker but unavailable for sale here. AM General Selected As Mercedes-Benz First and Only Contract Manufacturer of Vehicles in the United States SOUTH BEND, Ind., Jan. 27, 2015 /PRNewswire/ -- AM General LLC and Mercedes-Benz U.S. International, Inc., today announced that Mercedes-Benz has selected AM General to manufacture the Mercedes-Benz R-Class luxury vehicle at AM General's world-class 675,000 square-foot Commercial Assembly Plant.

Mercedes working on new inline-six engines

Mercedes-Benz will make a return to the inline-six-cylinder engine game, according to a report from the UK's AutoCar. It's not clear what's prompting the phasing out of the current array of V6s.
We'll see the first inline-six from Mercedes in next-generation E-Class, set to debut in 2016. Following that, it'll arrive as part of a mid-cycle refresh for the C-Class in 2017. What's particularly special about the new inline-six is its modular nature, which will allow Mercedes to eventually spinoff three- and four-cylinder options, with the three-pot arriving alongside the new inline-six.
In other news, AutoCar uncovered some details on the next C-Class AMG, which will ditch its excellent 6.2-liter, AMG V8 in favor of a 4.0-liter, twin-turbocharged V8, although we've already told you about that. What we didn't know at the time, though, was that the 4.0-liter would be paired first with a new, seven-speed AMG Speedshift transmission and offer all-wheel drive. AC also reports that a nine-speed Speedshift is in the works.