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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 reveals F 015 Luxury in Motion concept at CES [w/videos]

Whatever you think of the idea, autonomous vehicles are emerging as the way of the future in the automotive industry, and Mercedes is showing its vision for that driverless destiny with the F 015 concept at CES this week. Billed as Luxury in Motion, the F 015 first popped onto our radar back in October when it was snapped under wraps and then again when the German automaker released the first teaser image previewing its silhouette, but has now taken center stage at the electronics expo in Las Vegas. So what is it exactly, you ask? Well, aside from being entirely autonomous – bringing together a suite of advanced technologies to take the driver out of the equation – it's also big. It's marginally larger than an S-Class, in fact, and with a more spacious one-box form that turns the cabin into a rolling living room. That's where you'll find four individual bucket seats that swivel towards each other, and pivot towards the giant doors for ease of ingress and egress. The doors open a full 90 degrees and the back ones swing suicide-style like on a Rolls-Royce, but without a B-pillar to get in the way. An array of six display screens turn the cabin – clad in wood, aluminum, glass and leather – into an all-enveloping "digital arena," with gesture-based controls, touch-sensitive screens and eye-tracking technology. Made of carbon fiber, aluminum and high-strength steel, the concept is some 40-percent lighter than a conventional automobile of its size. And while Mercedes isn't saying exactly what would provide the motivation (and to what effect), it does state that "the bodyshell of the F 015 Luxury in Motion was designed to allow the impact-protected integration of an electric drive system with fuel cell." The concept follows the debut of the Future Truck 2025 concept big-rig at the IAA Commercial Vehicles show in Hannover a few months ago, and is earmarked to make transportation through and between the world's growing cities a smoother, safer and less human-intensive ordeal. Whether that's the kind of future you want to live in is another matter, but you can scope it out in the videos and press release below and in the extensive gallery of images above for a closer look. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Race recap: 2016 Monaco Grand Prix gets very wet, a little wild

More than at any other race, the Monaco Grand Prix question is: which combination of demolition derby, Safety Cars, and bad pit strategy will decide the podium? Last year Lewis Hamilton's late, confounding pit stop cost him victory. The year before, Nico Rosberg's qualifying "mistake" put him on pole and Mercedes-AMG Petronas' pit strategy sealed his win – good for Nico, bad for Hamilton and the rest of the field. In 2013 Hamilton dropped from second to fourth when he lollygagged in the pits. In all three years, Rosberg won. The new X factor for 2016: a Red Bull resurgence that helped Daniel Ricciardo clinch his first career pole. Nevertheless, bad pit strategy had its say in the results. Ricciardo built up a 13-second lead by Lap 15 in spite of heavy rains that forced the Safety Car to lead the first eight laps of the race. Ricciardo stopped on Lap 23 to switch to intermediate tires for the drying track, ceding the lead to Hamilton. Hamilton pitted from the lead on Lap 31 for softs, then Red Bull pulled Ricciardo in again on Lap 32 and made a snap decision to put him on ultra softs, but the tires weren't ready when Ricciardo reached his pit box. What should have been a three-second pit stop turned into a 13.6-second pit stop. Ricciardo left the pits as Hamilton came down the straight and the Aussie lost the lead into the first corner. Despite two attempts to pass later in the race, Hamilton finished first, the Aussie second. It's the second race in a row where pit strategy cost Ricciardo a near-certain win. Conversely, Force India nailed both tire strategy and pit timing with Sergio Perez. The Mexican started in eighth but got into third before half the race was done, passing four cars in the pits, and finished on the podium's final step. Otherwise the order barely changed from about half distance, with Ferrari driver Sebatian Vettel in fourth, followed by Fernando Alonso in the McLaren, Nico Hulkenberg in the second Force India, Rosberg in the second Mercedes, Carlos Sainz for Toro Rosso, Jenson Button in the second McLaren, and Felipe Massa taking the final point for tenth for Williams. Storms didn't only hover over the area, though – dark clouds hung around several teams and drivers. Mercedes' reliability is no longer so reliable. The Silver Arrows suffered engine issues on both cars in qualifying, and Hamilton's problem almost kept him from setting a time in Q3.