2008 Mercedes Benz Clk 63 Black Series With Navi Carbon Fiber Only 11,400 Miles on 2040-cars

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Mercedes-Benz Concept IAA is a modern silver aero

While we English-speaking folk call it the Frankfurt Motor Show, our German friends call this week's bi-annual confab the Internationale Automobil-Ausstellung, or IAA. At first glance, then, you might think Mercedes-Benz named its Frankfurt concept, the Concept IAA, after the show it'd debut at. But, the Concept IAA isn't named for the show. It's actually an abbreviation for Intelligent Aerodynamic Automobile, and it's very aerodynamic indeed. This four-door coupe can transform, while moving, from its sedan-like design mode to an ultra-sleek, gas-powered fish of a car. This aerodynamic mode has a drag coefficent of just 0.19. That's sleeker than a Tesla Model S, and it ties the rating of the General Motors EV1 electric car. In fact, it's very nearly as aerodynamic as the Volkswagen XL1. The IAA can transform automatically at 80 kilometers per hour (about 50 miles per hour) or via the press of a button. When it enters an aerodynamic mode, eight segments at the back of the car extend out, adding over 15 inches to the overall vehicle length, effectively extending its already tear-dropped-shaped tail. And that's just the most visible aero aid. At the front of the car, flaps in the bumper extend out nearly an inch, while there's a smaller extender in the back bumper. These serve to keep air away from the wheel arches, where turbulence can become an issue. Of course, Mercedes has thought of this, too, fitting "Active Rims" that "alter their cupping from 55 mm to zero," whatever that means. There's even an active aero aid inside the front bumper, where a louver extends backward by 2.3 inches to smooth out the air traveling underneath the car. Outside of its super-slippery mode, the IAA is a relatively handsome four-door coupe, featuring the kind of plunging roofline that wouldn't look out of place on the company's pioneering CLS-Class. The interior is certainly worthy of the CLS, too. It's home to gorgeous white leather and touch-based controls, and in general, looks very luxurious. Mercedes' dogged pursuit of aerodynamics does not mean that the Concept IAA is some gutless ecomobile. Under the skin is a gas-powered, plug-in hybrid system that produces up to 279 horsepower and allows the sleek sedan to hit 155 mph. Its all-electric range is based, of course, on what mode its body is in. It's most impressive in aero mode, where it will cover 41 miles on a single charge. Switch over to design mode, and that figure drops slightly to 38.5 miles.

Mercedes G63 vs. BMW i8: Our silly drag race between the past and future

You see, we were just trying to conserve resources. We had Milan Dragway rented for a test of the AMS Alpha 10 Audi R8, and there was some extra track time, so we brought these two along. That's called saving money. Or something. Aside from being German, the G63 and i8 couldn't really be much more different – one is a prehistoric military vehicle with a nutty twin-turbo V8, the other a vision of the near future of efficient sports cars. So what did we do? We lined them up against each other, editor-in-chief Michael Austin in the i8 and me in the G-Wagen. Though we had a good idea of the likely winner – note which car the boss is driving – the results were still surprising. Watch for yourself above. Green Humor BMW Mercedes-Benz Coupe SUV Hybrid Luxury Performance Videos Original Video drag race milan dragway

Mercedes-AMG not making more Black Series models... for now

There was a time when AMG only made one version of any given vehicle, but those times are long behind us. These days it's cranking out entry-level AMG Sport models, the main AMG line and the more potent S-models. But what about the Black Series? According to Autocar, which spoke with Mercedes-AMG boss Tobias Moers at the Geneva Motor Show last week, the Black Series is still in the cards... just not for the short term. Moers said AMG is currently focused more on "making the cars more sophisticated, more precise" than about making headline-grabbing horsepower and torque figures. "The Black Series name... will be necessary in the future, but for now the base cars are so good. The Black Series must be at the top of the hill, but I don't know when or on what model yet." The nearest possible candidate could be the more hardcore version of the Mercedes-AMG GT that's in the works to take on the likes of the Porsche 911 GT3, but Moers didn't say whether that model would warrant reviving the Black Series label. AMG previously applied the Black Series designation to extreme high-performance versions of the SLK, SL, SLS, CLK and C-Class coupe, carrying upgraded engines, suspension, rolling stock, brakes and aerodynamics to make them more track-focused. Related Video: