2011 Gl450 4matic Used 4.6l V8 32v Automatic Suv Premium 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.

Watch Evo pick its 2015 Car of the Year in this epic video

With just a few days left in 2015, it's the perfect time to check out Evo's annual Car of the Year test to determine the greatest performance vehicle of the last 12 months. The writers' picks for the 11 finalists spanned a breadth of engaging models and included: Peugeot 208 GTi by Peugeot Sport, Lamborghini Aventador SV, Seat Leon Cupra Sub8, McLaren 675LT, Porsche 991 GT3 RS, Porsche Cayman GT4, Honda Civic Type R, Ferrari 488 GTB, Chevrolet Camaro Z/28, Lotus Evora 400, and Mercedes-AMG GT S. For the venue to test the mettle of these performance machines, Evo stuck close to home this year and visited the twisting roads at the beautiful north coast of Scotland. Racing brothers Marino and Dario Franchitti also came along for the ride to provide two more voices in the competitive challenge to determine a winner. Evo's video explains why each model deserves to be among such rarified company but doesn't gloss over their faults either. There can be only one winner, though. We don't want to spoil it, so check out the clip for magnificent views of these performance machines through the Scottish countryside.

Vision Mercedes-Maybach 6 Cabriolet is last year's concept with a soft top

Last year, Mercedes brought an absurd, excessive two-seat coupe to Pebble Beach called the Vision Mercedes-Maybach 6. We say absurd and excessive because it was a roughly 19-foot long coupe for just two people. It also packed a 750-horsepower electric powertrain. This year, Mercedes brought pretty much the same car, but now with a soft top and the suffix "Cabriolet." Because the Vision Mercedes-Maybach 6 Cabriolet is basically the same car as the coupe, it's also dripping with unashamed excess. It's still 19 feet long, it still carries only two people, and it still has 750 horsepower from electric motors. Mercedes claims that power will propel the car to 60 mph in under 4 seconds. Also like the coupe, it has a range of 200 miles on a charge, and with the right charger, can supposedly regain about 60 miles in 5 minutes. There are changes to the car, though. For one, it's painted a different color. Instead of the vibrant red of the coupe, the roadster is a navy blue that Mercedes says helps evoke the feeling of a yacht — more so than the size already did. It also has new wheels with a more conventional multi-spoke look. They're also have rose gold-painted accents. The change to a convertible body style alters the appearance of the Mercedes-Maybach 6 more than you'd expect, too. Now that a significant portion of the vehicle is finished in a contrasting color, the car looks a bit shorter, in a good way. It doesn't look cumbersome. The lack of a fastback also helps keep the tail from looking like it's sagging, as it does on the coupe. The interior of the Vision Mercedes-Maybach 6 Cabriolet is mostly the same as the coupe, too. It features the same white leather seats that blend into the doors and dashboard. It also has the wild wraparound display and clear center tunnel with light tubes that show the flow of electricity to the motors. Metal highlights are finished in rose gold hue, as is the stitching. The differences include more prominent shapes that imply air vents, as well as a wood floor with aluminum strips to complete the yacht feeling. Also, the buttons that dot the seats have Mercedes logos on them, and they're backlit. We also get a peak under the hood of the Mercedes-Maybach 6 Cabriolet. It opens up like pre-war cars with two panels connected by a center hinge. Because it uses compact electric motors and underfloor batteries, there's storage space under the hood.