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Mercedes spotted testing hardcore AMG GT at the 'Ring

Mercedes has showcased its new AMG GT in both base and S trims, it's rolled out the GT3 racing version and the Formula One safety car. But we're only beginning to see the extent of the variants that the German automaker is expected to spin off of its new sportscar. And here is the latest. Spied undergoing testing at the Nurburgring is what appears to be an even more performance-focused version of the Mercedes-AMG GT. It seems to be packing an upgraded aero kit – complete with front splitter and rear wing – as well as larger rolling stock. You can bet there's an even more potent version underhood of the 4.0-liter twin-turbo V8 that's already producing over 500 hp in the existing model. Whether Affalterbach deems it worthy of the Black Series label or not is another question, but what's clear is that AMG is gunning for the Porsche 911 GT3 with the performance model you see here – however disguised it may be from our prying eyes. Related Video:

Mercedes-Benz C-Class scores well in TUV lifecycle analysis

Mercedes-Benz drivers and treehuggers don't always go hand in hand, but, like a lot of other companies, the German automaker is looking to boost its green cred. This time, it's all about the car's lifecycle carbon footprint. The Daimler AG unit is using its new C-Class sedan as an example of how it's making progress in that department. Mercedes-Benz, citing the inspection authority TUV Sud, says the 2015 C-Class has a 10-percent lower lifecycle carbon footprint than its 2014 predecessor, based on driving about 125,000 miles over the life of the car. About 95 percent of the car (by weight) is recyclable, slightly higher than the average for most vehicles, and the model has upped its amount of recyclable materials up by 23 percent and increased its use of "natural materials" by 55 percent. Better aerodynamics also helps things out on the fuel-economy front, Benz says. Taking a longer view, the 2015 C-Class's carbon footprint is 28 percent better than the 2007 version that launched the vehicle line. The 2015 C-Class hasn't received a fuel-economy rating from the US Environmental Protection Agency, which tagged the 2014 C350 with a combined fuel-efficiency rating of 24 miles per gallon from its 3.5-liter 6-cylinder engine. Check out Mercedes-Benz's press release below and find the Autoblog First Drive impressions here. TUV Environmental Certificate: The new C-Class makes its mark with an exemplary life cycle assessment Stuttgart, Mar 28, 2014 The C-Class sets efficiency benchmarks for its class, helped by an intelligent lightweight concept, excellent aerodynamics and new, frugal engines. The neutral inspectors from the TUV Sud technical inspection authority have confirmed the high level of environmental compatibility of the new Mercedes-Benz C-Class. Besides a sensuous, clean-cut design, a top-class interior and a host of technical innovations, the premium saloon also boasts an exemplary life cycle assessment, which is why it has been awarded the Environmental Certificate in accordance with the ISO 14062 standard. Professor Dr. Herbert Kohler, Chief Environmental Officer at Daimler AG: "Our engineers have pulled out all the stops in an effort to lower fuel consumption while at the same time further accentuating the car's sporty character. By employing an intelligent lightweight design with a high proportion of aluminium, for example, it has been possible to make the new C-Class up to 100 kilograms lighter than its predecessor.

Buy a V8 Mercedes-Maybach, or splurge for a V12? Oh to have such problems

There's a certain air that surrounds the Maybach badge, and it's not just the scent being pumped out by the ionizer in the car's glovebox. It's the cream of the crop when it comes to German luxury. These cars are filled with an acre's worth of wood and a herd's worth of cows, ensuring your fingers rarely touch materials as pedestrian as plastic. It's as quiet, as smooth, and as imposing as you think it would be. Though the latest model from Mercedes-Maybach, the S550, might have swapped in a V8 and all-wheel drive in place of the V12 at the heart of the S600, no other amenities have been lost in translation. The car's size gives it a certain presence. Staring at the profile shows a wheelbase that spans two counties, necessitating a microphone and speaker setup simply so that the driver can converse with the passenger – and a Maybach will almost always have a passenger. No one buys a Maybach to drive. You buy a Maybach to be driven. No means of transport short of business-class airline seating offers this much space. Sit back, recline the seat, roll up the shades and enjoy your $167,125 cocoon. But you know all of that already. What you really want to know is if $25,000 - the V12-powered S600 starts at $192,225 - is worth it to gain an extra four cylinders, 74 horsepower, and 96 lb-ft of torque. On paper, no, it's not. The two cars have identical performance numbers, and the S550 benefits from Mercedes' 4Matic all-wheel-drive system. Even with all-wheel drive, the S550 weighs less than the nose-heavy S600. Fuel economy is, as expected, superior in the S550. It's rated at 16 city, 24 highway and 19 combined as opposed to 13 city, 21 highway, and 16 combined. Visually, the two cars are identical save for a few badges. The V12 badge on the S600 is replaced with a 4Matic badge on the S550, and that's where things start to get murky. When you're spending six figures on a car, decisions become more emotional than practical. $25,000 is a lot of money, but there's a bigger difference between $25,000 and $50,000 than there is between $167,000 and $192,000. As stated, you don't buy these cars to drive. Performance needs to be merely adequate. A smooth, torquey V12 is likely preferable to a hairy-chested V8, refined as it may be. These cars will never touch redline, lest the passengers spill their champagne. Plus, that V12 badge is worth its weight in country club memberships. Driving an S550 is fine until an owner shows up at an event behind an S600.