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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 Concept GLA45 AMG is ready to run

This is the Mercedes-Benz Concept GLA45 AMG, and what we mean by that is, "This is the Mercedes-Benz GLA45 AMG." Mercedes has just unveiled the liveried 'concept' at the 2013 Los Angeles Auto Show, giving potential customers a very good look at the newest lunatic in the AMG asylum - a 355-horsepower, 332-pound-foot crossover that uses the same 2.0-liter, turbocharged four-cylinder engine found in the CLA45 AMG and Europe's A45 AMG.
Joined with a seven-speed, AMG Speedshift dual-clutch transmission and an AMG Performance 4Matic all-wheel-drive system, Mercedes promises a sub-five-second run to 60 miles per hour. That's not just quick for a crossover, that's quick full stop.
That sleek, lifted body has also been tweaked by the minds at AMG's Affalterbach facility. A new rear spoiler, side sills and front clip are the primary aerodynamic tweaks. Aesthetically, AMG has fitted the requisite "Turbo" badges, gloss-black accents (including exhaust tips and roof rails) and a set of 21-inch, AMG-spec alloy wheels to round out the overall package. Based on the spy shots we've seen, expect slightly toned down aerodynamics when the GLA45 AMG arrives in showrooms.

Mercedes recalling 33k C-Class and CLS-Class models in separate campaigns

Mercedes-Benz is recalling over 33,000 vehicles in the US in separate actions affecting two of its model lines. The larger campaign covers 30,141 examples of the 2015 CLS400 and CLS400 4Matic; 2012-2015 CLS550 and CLS550 4Matic; 2012-2014 CLS63 AMG and 2014-2015 CLS63P AMG. On these vehicles, the LED taillights do not sufficiently illuminate around the sides, and therefore they run afoul of the Federal Motor Vehicle Safety Standard. According to documents posted by the National Highway Traffic Safety Administration (as a PDF, here), "this is due to a software coding issue which leads to the non-activation of a certain LED in both taillamp units." An update of the programming by the dealer fixes the problem. The other recall covers 3,039 units of the 2015 C300 4Matic and C400 4Matic for two possible problems with the fuel delivery module of the fuel tank. First, the locking plate for the part might loosen on some of these vehicles, and that can cause a fuel leak, which is obviously dangerous. Also, the electric wires going into the component might be pinched, which can lead to failure of the fuel pump. Dealers will inspect the models for both issues and will repair any faults they find. Mercedes did not tell NHTSA when owners would receive notification about either of these campaigns when the company submitted the documentation to the agency on March 10. Autoblog reached out to company spokesperson Christian Bokich via email for more information. "We currently expect to be in touch with customers by late March. Customers may continue to drive their vehicles until the recall is performed," he said. Related Video: RECALL Subject : Rear Side Marker Illumination/FMVSS 108 Report Receipt Date: MAR 10, 2015 NHTSA Campaign Number: 15V137000 Component(s): EXTERIOR LIGHTING Potential Number of Units Affected: 30,141 All Products Associated with this Recall Vehicle Make Model Model Year(s) MERCEDES BENZ CLS400 2015 MERCEDES BENZ CLS550 2012-2015 MERCEDES BENZ CLS63 2012-2015 Details Manufacturer: Mercedes-Benz USA, LLC. SUMMARY: Mercedes-Benz USA, LLC. (MBUSA) is recalling certain model year 2015 CLS 400 and CLS 400 4matic, 2012-2015 CLS 550 and CLS 550 4matic, 2012-2013 CLS 63, 2014 CLS 63, and 2014-2015 CLS 63P. The affected vehicles have LED tail lights that may not light on the sides, reducing the rear side visibility of the vehicle. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No.