2012 Mercedes Benz Sls Roadster In Black With Designo Brown Only 600 Miles 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 C-Class Coupe due to go on sale next December

While we expect to see the coming Mercedes C-Class convertible sometime next year, perhaps at the Paris Motor Show, Auto Motor und Sport reports that the C-Class Coupe will go on sale in December 2015 (probably in Europe first) - it's possible we'll see it debuted at the same time as the cabrio. The German magazine says the two-door will have sharper lines on a body that is four inches longer, almost two inches wider and a fraction of an inch lower than the sedan, dimensional aggrandizement that will be put to good effect on the AMG version coming in 2016. We'll have to wait for information on powertrains, which should hew to the sedan's lineup in addition to whatever else M-B might bring over here, topped off by the 503-horsepower, twin-turbo V8 in the AMG variant. Speaking of which, the 'last-generation' C63 AMG Coupe is still on sale until spring of next year, if you're a fan of the classics. Or you can wait on news of the C-Class four-door coupe, if niches inside of niches are what you're really after.

Formula One's Valtteri Bottas can turn it up to 11 in Spain

BARCELONA - Valtteri Bottas can add his name to one of Formula One's longest sequences by following up his breakthrough win in Russia with another triumph when the European season starts in Spain this weekend. The Finn, fresh from his first Grand Prix victory with champions Mercedes in Russia, is the man most likely to become the 11th different winner in a row at Barcelona's Circuit de Catalunya. No other track on the calendar has had such a variety of winners over the past decade, an ironic fact given that it is the most familiar to drivers from winter testing and was once famed for its predictability. Last year it was Dutch 18-year-old Max Verstappen who became the sport's youngest winner when he triumphed for Red Bull, on his team debut, after both Mercedes drivers collided at the start. In 2012, it was now-departed Venezuelan Pastor Maldonado -- a one-hit wonder -- who handed Williams a surprise victory that remains their most recent. Ferrari's championship leader Sebastian Vettel and Mercedes rival Lewis Hamilton, 13 points behind the German, will start as favorites and success for either could be an omen given that both went on to take the title last time they won in Spain. But Bottas, who joined Mercedes from Williams in January as replacement for retired 2016 world champion Nico Rosberg, is the best bet to continue the streak of different winners in Spain even if he has yet to finish higher than fourth there. "Getting that first win definitely gives me a lot of confidence that I can do it, even though I always knew I had the ability," he said after Sochi. "And now it's done, I just want to do it again and again." RICCIARDO REVIVAL The only other driver from the leading trio of teams yet to triumph in Barcelona is Verstappen's Australian team mate Daniel Ricciardo, but the Red Bull has lagged Mercedes and Ferrari on pace so far this year. That will surely change, with the flow of upgrades set to speed up now that teams are closer to their factories, and Red Bull have some big chassis modifications in the pipeline with engine improvements still to come. "I hope the upgrade will give us a chance to really fight with Mercedes and Ferrari or at least get us closer," said Ricciardo. The driver of car number 11, Force India's Mexican Sergio Perez, has racked up 14 successive points finishes and he too will have aerodynamic updates on his car.