1985 Mercedes Benz 300d Turbo Diesel 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 GLE-Class shows a new face for the luxury crossover in NYC

Segments don't get much hotter than luxury crossovers at the moment, and that makes for some perfect timing for Mercedes-Benz to unveil the GLE-Class at the 2015 New York Auto Show. As a replacement for the M-Class, the new model offers a more traditional looking alternative to the styling of its swoopy sibling, the GLE-Class Coupe. Mercedes' designers crafted a nose for the GLE that gives it a strong family resemblance to the Coupe, but the rest of the shape bears a chunky, more utilitarian appearance. Elsewhere, the new model sticks with the thick C-pillar and wraparound rear glass of the outgoing M-Class but with sharper edges for a slightly more muscular look. Stepping inside, occupants find all of the German luxury brand's latest styling cues. Mercedes is making a major commitment to adding more plug-in hybrids to its vehicles in the coming years, and the GLE is one step in that process. The lineup includes the GLE550e 4Matic that pairs a 3.0-liter, twin-turbo V6 with electric assistance to produce a total of 436 horsepower and 479 pound-feet of torque. The German brand isn't going entirely green, though, and the range also includes the Mercedes-AMG GLE63 and GLE63 S, powered by a twin-turbo 5.5-liter V8 that produces 550 hp or 577 hp, respectively. Check out the photos above from the show floor to get a full look at this upscale crossover before it arrives at dealers later this year.

2013 Mercedes-Benz SL65 AMG

Make way for the 2013 Mercedes-Benz SL65 AMG, the most wonderfully preposterous car I have ever driven.
There is absolutely no reason why any two-seat roadster should be fitted with a twin-turbocharged 6.0-liter V12 developing 621 horsepower and 738 pound-feet of torque, but I sure am glad that Mercedes-Benz doesn't see things that way.
Drop into the leather-lined cockpit of this $213,145 provocateur, floor the accelerator pedal as I did over and over again, and 60 miles per hour falls in a traction-limited 3.9 seconds. Top speed has been electronically held to 186 mph (this apparently saves Gulfstream jet owners from embarrassment). Forget the SL550 and SL63 AMG, the valets will trip over themselves attending to the tycoon driving this thoroughbred - it's the real deal.