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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

2015 Mercedes-Benz S550 PHEV offers the best of both worlds it's ready to conquer

The Mercedes-Benz S-Class just keeps growing – both in terms of dimensions and in terms of variants. Nevermind the S-Class Coupe for a moment and focus only on the sedan: in North America alone, you can get the big Benz in S550, S600, S63 and S65 spec, and at the Los Angeles Auto Show this year, Daimler has rolled out the new Maybach version as well. But if it's a more environmentally friendly way to woosh around town in serene luxury that you're after, you'll want to look at the new S550 Plug-In Hybrid. Joining Daimler's growing range of battery-powered models alongside the E400 Hybrid, B-Class Electric Drive and Smart ED (the latter soon to be replaced by an all-new version), the S550 PHEV is the German automaker's first plug-in hybrid. It was first announced over a year ago and made its debut at the Frankfurt Motor Show last year, but now the US-spec car is making its North American debut in LA. Promising "the performance of a V8 and the fuel consumption of a compact model," the S550 PHEV pairs a 3.0-liter twin-turbo V6 to an 80-kW electric motor, the S550 PHEV packs a combined 436 horsepower and 479 pound-feet of torque to reach 62 in just 5.2 seconds, top out at 130 miles per hour or drive up to 20 miles on electric mode alone. On the European combined cycle, it'll return an impressive 84 miles per gallon, all the while never skimping on the luxury. Scope it out in our gallery of photos from the show floor in LA and delve into the details in the press release below. First PLUG-IN HYBRID with a star: S550 PLUG-IN HYBRID The new Mercedes-Benz S550 PLUG-IN HYBRID blends an ultramodern hybrid drive configuration with the unique innovations and the luxurious equipment and appointments of the S-Class. The luxury sedan impresses with exceptional dynamism and efficiency. Thanks to standard pre-entry climate control it also offers unique climate comfort. The first certified three-liter luxury sedan in the world is a further milestone on the road to emission-free mobility. "The S550 PLUG-IN HYBRID is the first luxury sedan with the performance of a V8 and the fuel consumption of a compact model. The greatest challenge in this is to translate efficiency into superior performance. In this respect there is a highly interesting parallel with our successful Formula 1 racing car, which likewise has a turbocharged V6 engine and a high-tech hybrid drive," says Prof. Dr.

Chris Harris and David Coulthard wring out a Mercedes Fintail at the N"urburgring

If there's one thing we've learned from the latest video from Drive, it's that the combination of Chris Harris and David Coulthard will produce some very quotable moments. Take this exchange, for example.
DC: "We are by some way the slowest."
CH: "But we're in a class of three cars, apparently."