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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 pays tribute to 1955 Mille Miglia with special-edition SL

The Mercedes-Benz SL is one of the longest-running nameplates in the business, and its history has been marked with numerous achievements. But few were as impressive as the 1955 running of the Mille Miglia, and Mercedes pays tribute to that race and the results it achieved there with this latest special-edition roadster. Called the SL Special Edition Mille Miglia 417, this roadster starts with the eight-cylinder SL550 with dynamic stability management and adaptive damping and adds on several highlights. Red trim adorns the front spoiler, the stripe across the matte carbon rear spoiler, the brake calipers and the rims of the black AMG Performance wheels. The red pieces accent the matte black paint, while the interior features AMG Line sports seats with carbon-finish leather and red trim, along with a red and black nappa leather steering wheel and carbon trim. The SL arrives 60 years after the Mille Miglia in which a 300 SL driven by American gentleman racer John Fitch - bearing the number 417 and starting at 4:17 a.m. - led a 1-2-3 class finish, landing fifth overall and leaving many purpose-built racers in the dust. The special edition is confirmed for the US, arriving this fall with pricing to be announced closer to launch. SPECIAL EDITION SL "MILLE MIGLIA 417" Exclusive SL passion February 17, 2015 - Stuttgart -- Mercedes-Benz celebrates the 60th anniversary of a memorable motor racing success with an extraordinary special model of the SL Roadster. Its name commemorates the unexpected victory of a 300 SL in the production sports cars class at the 1955 "Mille Miglia", one of the world's most challenging long-distance races. What's more: the SL Special Edition "Mille Miglia 417" provides a special experience of the unique symbiosis of maximum comfort and motor racing spirit that traditionally characterizes every SL. The Special Edition adds a distinctive note, among other things, with red exterior highlights and fine materials in the exclusively appointed interior. The Mercedes-Benz SL Roadster is more than an icon. Passion shapes its character and its charisma – in the past and today. Legendary vehicles and their stories dominate the model history. One of them is told by the SL that started the famous "Mille Miglia" in 1955 with race number 417 at 4:17 am. After 11 hours, 29 minutes and 21 seconds it had completed the race distance of 1597 kilometres on public roads from Brescia to Rome and back.

Lewis Hamilton beats Sebastian Vettel in Chinese Grand Prix

SHANGHAI (Reuters) - Lewis Hamilton mastered Shanghai's changing conditions and stayed clear of squabbling rivals to win the Chinese Formula One Grand Prix on Sunday. The Briton eased his Mercedes across the line 6.2 seconds ahead of Ferrari's Sebastian Vettel. Max Verstappen, who started 16th, finished a surprise third to hand his Red Bull team their 100th podium. It was Hamilton's 54th career win and a record fifth in Shanghai. But it was the triple champion's first this season and returned Mercedes to the top of the podium after Vettel won last month's season-opening race for a resurgent Ferrari. "I'm so happy with my first win of the year and I can't believe it if I'm honest," said Hamilton after the race, which also handed him his 106th podium, putting him joint second with Alain Prost on the list of drivers with most rostrum results. "What I said to Sebastian as I left the last race ... I said I'm coming back in the next one. When I got on the podium it was like 'I told you'." MOTOR-F1-CHINA/ View 12 Photos Hamilton, who finished second to Vettel in Melbourne, heads into the next race in Bahrain in a week's time tied on points with the German. Mercedes, meanwhile, lead the constructors' standings by one point over Ferrari. Hamilton started from pole position, but the conditions were a bit of a lottery for all the drivers with the track damp in patches but drying quickly. He kept the lead off the line ahead of Vettel, who came under investigation for lining up out of position on his grid slot. The German, though, stayed second, fending off Valtteri Bottas in the other Mercedes, who had started third. Lance Stroll, the 18-year-old rookie, spun off the track on the first lap after making contact with Force India's Sergio Perez. The Canadian beached his Williams in the gravel, bringing out the virtual safety car. Vettel took the opportunity to dive into the pits to change to dry weather tires. His gamble backfired when Antonio Giovinazzi — standing in for Pascal Wehrlein at Sauber — crashed, bringing out the actual safety car two laps later. The four-times world champion found himself bottled up behind Ricciardo and his slower team-mate Kimi Raikkonen, costing him valuable time. As the trio squabbled for position, Hamilton pulled clear at the front. By the time Vettel managed to get past, with a series of spectacular overtaking moves that included banging wheels with his former team-mate, Hamilton was too far ahead.