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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.

Singer Porsche, Koenigsegg, NSX: Leno's life doesn't suck

Jay Leno had quite a productive trip this year during Monterey Car Week. Not only did he get to pal around with Ian Callum and check out the Pebble Beach Concours d'Elegance, but the denim-clad comedian also headed to The Quail to talk to some prominent figures in the modern sports car scene. Capping off the fun, he got to take a drive in a Mercedes-AMG GT S, too Perhaps the highlight of this show is a nearly 10-minute interview with Christian von Koenigsegg. The founder of the Swedish hypercar company digs deep into the Agera One:1's engineering details, relating interesting facts about the aerodynamics and transmission. In addition, Leno chats with Rob Dickenson of Singer about its newly reimagined Porsche 911 Targa, and he gets the latest scoop on the Acura NSX's progress from newly promoted Acura Vice President and General Manager Jon Ikeda. If you like hearing about the nuts and bolts of sports car development, then this video can't be missed. Of course, we were there at Monterey, too, and we pointed our own cameras at some of the amazing machinery, both vintage and modern, at all the various car-focused events of the week. Take a look back at some of our own cool footage in the videos below. Related Video:

Trump reportedly says he wants to wipe German cars off the U.S. map

BERLIN/FRANKFURT — A report that U.S. President Donald Trump has threatened to pursue German carmakers until there are no Mercedes-Benz rolling down New York's Fifth Avenue dented shares in the luxury car manufacturers on Thursday. An excerpt from German magazine Wirtschaftswoche's article, which cited several unnamed European and U.S. diplomats but did not include any direct quotes, could not be independently verified, while a U.S. Embassy spokesman in Berlin referred questions to Washington. The news and current affairs magazine said Trump had told French President Emmanuel Macron in April that he aimed to push German carmakers out of the United States altogether. Macron's administration in Paris declined to comment on the report. The Trump administration last week opened a so-called Section 232 trade investigation into vehicle imports, which could result in a 25 percent tariff on cars on the same "national security" grounds Washington used to impose metals duties in March. This could destroy exports by German carmakers, which control 90 percent of the U.S. premium market and are the biggest European Union exporters of cars to the United States. BMW owns Rolls-Royce, while Daimler has Mercedes-Benz, and Volkswagen controls Bentley, Bugatti, Porsche and Audi. Daimler, BMW and Audi declined comment. Porsche was not immediately available for comment. BMW shares were trading 0.5 percent lower at 0939 GMT, while Daimler and VW's shares were down 1 percent and 1.6 percent respectively, underperforming Germany's blue-chip DAX. Trump has railed against German carmakers before. And in early 2017, in an interview with German newspaper Bild, he said he would impose 35 percent tariffs on imported cars. At the time, the president called Germany a great car producer but said that the business relationship with the United States was an unfair one-way street. Germany's auto industry association VDA says its members exported 657,000 vehicles to North America last year, with total exports of vehicle components, cars, engines, as well as second-hand vehicles totaling 31.2 billion euros in 2016. Imports from the United States to Germany amounted to 7.4 billion euros, meaning a trade deficit of 23.8 billion euros the VDA's latest available figures show. However, German brands also have huge factories in the United States, where they built 804,000 cars last year, VDA said, providing jobs for U.S. workers. Berlin has reacted angrily to the U.S.