2006 Mercedes-benz Clk350 Base Coupe 2-door 3.5l on 2040-cars

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Mercedes Concept IAA shows its mighty morphing aero aids

Modern supercars are utilizing more active aerodynamic elements that constantly adjust, to make them some of the fastest things on the road. The Mercedes-Benz Concept Intelligent Aerodynamic Automobile is using them too, but the know-how is applied here for ultimate efficiency rather than turning better lap times. In the standard design mode, the four-door luxury coupe looks like a CLS from the near future with styling that's mixed with a little of the F 015 concept. However at the press of a button or upon hitting about 50 miles per hour, the IAA transforms into aero mode to have an insanely low drag coefficent of just 0.19. To achieve the ultra-efficient shape, the rear of the concept stretches over 15 inches to guide air down the tail. Flaps in the bumpers also extend outward, and the wheels adjust to improve the flow around the sides. To trim things out underneath, a portion inside the front bumper moves, as well. Inside, passengers sit in organically shaped leather seats, but occupants have to look at a vast array of purple and blue LED accent lights. The big panoramic roof is a nice touch, though. It would be interesting to watch water tumble over this slippery shape when driving in the rain. To maximize efficiency, Mercedes powers the IAA with a plug-in hybrid that's hooked up to a gasoline engine. The result is 275 horsepower and an electronically limited top speed of 155 miles per hour. On the European testing cycle, the company figures the concept could cover 41 miles solely on electric power in aero mode. Showing the gains of the swoopy transformation, that figure falls to 38.5 miles in design mode.

Brabus Mercedes-AMG GT is a 600-hp exercise in restraint

Big, wild, crazy vehicles from local tuners are one of the highlights of all European auto shows, where even high-performance cars get ludicrous amounts of horsepower and questionable body mods. Occasionally, though, one tuning shop comes out with something that is actually pretty reasonable in both departments. At the 2015 Frankfurt Motor Show, that vehicle comes from Brabus and its take on the Mercedes-AMG GT, simply called the Brabus GT. Sure, it has 600 horsepower, which is a lot, but it's only 97 hp more than stock. Asking a European tuner to increase a car's horsepower by just 97 ponies is like asking a six-pack-a-day smoker to quite cold turkey – it requires a tremendous amount of self-control. It's a similar story on the body, where we get a new body kit, new wheels, and a slightly tweaked interior. Now, to be fair, the body kit is made from carbon fiber and the wheels are staggered, multi-spoke alloys, but neither mod is too garish. The cabin gets new black leather, which comes from cows and not some other typical Euro tuner hide, like whale foreskin. The steering wheel gets an Alcantara wrap, and there's some carbon-fiber and wood trim added as well. It's all very, very simple, and not just for a European tuner – we could picture Mercedes itself coming up with a very similar treatment if/when it does an AMG GT Black Series. We've got a wide array of live photos of the new Brabus GT from its Frankfurt debut. Scroll up and check them out. Related Video:

Volvo, Others to Assume Liability for Driverless Cars | Autoblog Minute

Self-driving cars could make our commutes a breeze but what happens when something goes wrong? Three industry leaders step up with an answer. Autoblog's Adam Morath reports on this edition of Autoblog Minute. .FW Mercedes-Benz Volvo Autoblog Minute Videos Original Video john krafcik Hakan Samuelsson