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These are the 'Greenest' and 'Meanest' cars in 2015

As has become tradition, the American Council for an Energy-Efficient Economy (ACEEE) has come up with a ranking of what it refers to as the "greenest" cars of 2015, and, by way of contrast, a list of the so-called "meanest" cars, so those who value eco-friendliness over all else can choose which vehicles they should or should not consider buying. As you may expect, electric cars make up the majority of the greenest cars on the list, but, perhaps surprisingly to many, the Tesla Model S didn't make the cut. It's worth noting, too, that where the electricity an owner uses to charge their electric vehicle has a big impact on its overall environmental impact. "A car that is charged using electricity generated from natural gas or renewables is going to have significantly less impact on the environment than one charged on a coal-heavy grid," says ACEEE lead vehicle analyst Shruti Vaidyanathan. The ACEEE's list for 2015 looks very different than it did in 2014. It's an interesting collection, though – and we're sure this goes without saying, really – we'd recommend doing a bit more research into each vehicle and how it might fit into your daily life before making any purchase decisions. Click here to see the ACEEE's list of the Greenest and Meanest vehicles sold in the United States in 2015. Green Bugatti Chevrolet Fiat GM GMC Mercedes-Benz Nissan RAM smart Toyota greenest greenest cars

2017 Mercedes-Maybach S650 Cabriolet includes guaranteed exclusivity

For certain buyers, the only thing better than a super-luxurious cabriolet that requires enormous sums of money to buy is a a super-luxurious cabriolet that money can't buy. That's what Daimler promises with the 2017 Mercedes-Maybach S650 Cabriolet to be unveiled at the LA Auto Show. Limited to 300 units worldwide and just 75 in the US, having just three available color combinations magnifies the exclusivity. Turning the Mercedes-Benz S-Class cabrio into a droptop worthy of the Maybach family means slight revisions outside and in, and a whole lot of Maybach badges. Instead of the three lower intakes familiar from Mercedes' corporate language, there's black mesh highlighted by a shiny design element. It's not the most graceful face from dead-on, looking sort of like a chrome-lined grimace picked up from Wallace and Gromit. A Maybach emblem adorns the fenders and gleaming kickplates, the 20-inch wheels add an edge to the brand's traditional dinner-plate design. The 6.0-liter, twin-turbo V12 carries over from the donor convertible, with the same 621 horsepower and 738 pound-feet of torque hooked up to a seven-speed automatic transmission. The only three color treatments available in the US will be Zircon Red with a porcelain and black interior and a black top, Cote d'Azur Blue with a porcelain and saddle interior and a beige top, and Designo Diamond White with a porcelain and Yacht Blue interior with a dark blue top. The cabin works nautical themes lifted in part from the Mercedes-Benz Style Arrow 460-Granturismo yacht. Perforations in the leather seats evoke waterfalls. The "Flowing Lines" trim ornamenting the seats comes two different colors depending on the exterior hue; either "Piano lacquer" black with the Zircon Red or Magnolia Nut Brown with the other two options. Buyers will find profuse badging in embroidered, embossed, and inlaid varieties, as well as chrome-plated "1 of 300" lettering in several places like the cup holder and steering wheel. The few lucky customers who buy an S650 will also find a four-piece set of Maybach-badged luggage in the truck, two travel bags and two weekenders tooled up in the same leather as the interior. The key fob gets finished in Porcelain leather. A car cover comes standard, in the same color as the convertible top. A certificate signed by the mustachioed one, Daimler Chairman Dr. Dieter Zetsche, provides the corporate-badged icing on the cake.

Daimler exec hypothetically discusses 3-cylinder engines for small hybrids

Is three the magic number of cylinders for Mercedes-Benz parent Daimler and its efforts to build smaller powertrains for its compact hybrids? Potentially, yes, the German automaker could see the need for three-cylinder mills, Automotive News reports. The company doesn't have any plans for them as of yet, though. Daimler executive Bernhard Heil talked with Automotive News about the challenges of using four-cylinder engines in a front-wheel-drive setup and said that three-cylinder engines could work in transverse-mounted powertrains for hybrid cars. For now, though, the company doesn't actually have any plans to go in that direction, Mercedes-Benz spokesman Christoph Horn said in an e-mail to AutoblogGreen. Horn wrote that Heil "actually said that if ever MB would use a three-cylinder engine than [it would be] in a configuration where space is restricted, such as when using a hybrid power train in a compact car." Of course, the only compact "hybrid" that Mercedes-Benz has is the 2015 C-Class, but that refers to the "hybrid" body is made of 48-percent aluminum, up from the current nine percent, as well as steel. It has nothing to do with the powertrain. Beyond that, there's always the Mercedes-Benz S500 Plug-in Hybrid that the company unveiled at the Frankfurt Motor Show last fall, but that model, which will debut in Europe later this year and arrive stateside next year, has a 3.0-liter turbocharged V6 and an 80-kilowatt electric motor that propels the plug-in from 0 to 62 miles per hour in 5.5 seconds. Not exactly three-cylinder territory, that.