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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

Maybach could become Mercedes-Benz sub-brand

When you're arriving in a twin-turbocharged, twelve-cylinder Maybach limo, there's no reason you should ever have to be late. Except, maybe, to make a fashionable entrance. But up at the corporate level, the entire Maybach brand is being slowed down as critical decisions about its future are being undertaken.
Last week, we reported that a decision on what path Maybach would take going forward would be due at the start of next month, but the latest reports indicate that the timeframe has been extended as further options are being considered.
The previous options under consideration were twofold: either relaunch the brand with production outsourced to Aston Martin - which suddenly finds itself with excess production capacity - or shut it down completely. And those are still two very real options. Word has it that Aston has put together four concept cars for the Daimler brass to consider, all based on the next-generation S-Class platform (and thankfully not the old one).

Mercedes teases a new Maybach concept convertible

Once again, Mercedes is taking a Vision concept to the Pebble Beach Concours this year. To start generating excitement, the company has released a teaser trailer for the car, and effectively no other information. But we think we've pieced together what the car is. Let's look at the video first. It shows a voluptuous blue body. It's all curves and clean lines inside and out. It also has an impressively prodigious prow with a proud three-pointed star at the front. The interior is all white with very little detail, and in addition to chrome, there are many copper trim pieces. There appear to be only two seats, too. Toward the end, we see a strip of copper trim on the outside as well, and just before the shot changes, we can see a bit of white interior that indicates this is a convertible. So we know this is an elegant, luxurious roadster. Is there anything else we can discern? Well, it seems Mercedes may have accidentally revealed the name of the car, or at least what it's based on. The video's file name includes the words "Maybach six." That happens to be the name of last year's Mercedes-Maybach coupe concept. On top of that, there's a striking resemblance between the long, flowing hoods of both cars. So it seems like a pretty safe bet that Mercedes will show the convertible version of that car, which was 18 feet long, and produced 738 horsepower from a quartet of electric motors. We'll find out if we're right when the car is revealed at Pebble Beach. Related Video: Image Credit: Mercedes-Benz Design/Style Maybach Mercedes-Benz Technology Emerging Technologies Convertible Concept Cars Electric Luxury Pebble Beach