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Open Image ModalThe Cadillac Elmiraj concept is shown during media previews at the North American International Auto Show in Detroit, Tuesday, Jan. 14, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe Subaru WRX STI is unveiled at the North American International Auto Show in Detroit, Tuesday, Jan. 14, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalThe Acura TLX prototype is unveiled at the North American International Auto Show in Detroit, Tuesday, Jan. 14, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalThe 2015 ATS coupe debuts during media previews during the North American International Auto Show in Detroit, Tuesday, Jan. 14, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe new Cadillac logo is shown on the 2015 ATS coupe during its debut at media previews during the North American International Auto Show in Detroit, Tuesday, Jan. 14, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe 2015 ATS coupe debuts during media previews during the North American International Auto Show in Detroit, Tuesday, Jan. 14, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalMichigan Gov. Rick Snyder, left, behind the wheel of a Cadillac ELR, shares a laugh with Timothy Lee, Executive VP Global Management Company (GMC) during a walk through of the auto show on Tuesday, Jan. 14, 2014 in Detroit. Snyder says the state manufactured more than 2 million cars last year, a nation-leading number that's more than double the industry's dark days of 2009 and the highest level since 2005. (AP Photo/Detroit News, Daniel Mears) (credit:AP)
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Open Image ModalThe new Lexus RC F Coupe is shown at the North American International Auto Show in Detroit, Tuesday, Jan. 14, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalThe new Lexus RC F Coupe is unveiled at the at the North American International Auto Show in Detroit, Tuesday, Jan. 14, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalLexus Group Vice President and General Manager Jeff Bracken reveals the new Lexus RC F Coupe at the North American International Auto Show in Detroit, Tuesday, Jan. 14, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalTom Doll, president and COO of Subaru of America stands next to the new WRX STI at the North American International Auto Show in Detroit, Tuesday, Jan. 14, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalThe Infiniti Q50 Eau Rouge is unveiled during media previews during the North American International Auto Show in Detroit, Tuesday, Jan. 14, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalJournalists view the Infiniti Q50 Eau Rouge during media previews during the North American International Auto Show in Detroit, Tuesday, Jan. 14, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe Infiniti Q50 Eau Rouge is shown during media previews during the North American International Auto Show in Detroit, Tuesday, Jan. 14, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe Kia GT4 Stinger concept debuts during media previews during the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalNatalie La Rose sings during as the Mini John Cooper Works concept is unveiled during media previews during the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe new Continental GT V8 S on display, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalThe new Continental GT V8 S on display, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalThe Nissan Sport Sedan concept is unveiled, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalNissan Sr. Vice Pres. and Chief Creative Officer Shiro Nakamura speaks about the Nissan Sport Sedan Concept, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalThe Nissan Sport Sedan concept is unveiled, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalA Ford Mustang is seen in the automaker's display area at the North American International Auto Show is seen in Detroit, Monday, Jan. 13, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalAmerican Honda Motor Co., Executive Vice President John Mendel unveils the 2015 Honda Fit at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalThe Volvo XC Coupe concept is shown during media previews during the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalAlain Visser, Senior Vice President Marketing, Sales and Customer Services speaks about the Volvo XC Coupe concept during media previews during the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalJournalists look over the Hyundai Genesis at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalThe Hyundai Genesis is unveiled at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalThe Toyota FT-1 concept is unveiled during media previews during the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe Toyota FT-1 concept is unveiled during media previews during the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe Toyota FT-1 concept is unveiled during media previews during the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe Mercedes GLA 45 AMG compact SUV is displayed, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalThe passenger front wheel of the new Mercedes GLA 45 AMG compact SUV, is displayed Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalThe Volkswagen Beetle Dune concept car is unveiled, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalThe Volkswagen Beetle Dune concept car is unveiled featuring ski mounts on the roof of the hatch, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalThe Volkswagen e-Golf fully electric vehicle, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalMichael Horn, incoming President and CEO of Volkswagen of America, speaks about the new Golf R hatchback, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalThe Audi all road shooting brake is unveiled at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalMedia gather around the Audi all road shooting brake after its unveiling at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalThe 2015 Chevrolet Corvette Z06 debuts at media previews during the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalDan Amman, President, General Motors speaks about the Chevrolet Corvette Z06, left and Corvette C7-R during media previews at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalA new Mercedes C-Class sedan is presented, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalSinger Kelly Rowland performs before the new Mercedes C-Class is presented, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalThe Mercedes S-Class Coupé concept car is unveiled, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalIncoming General Motors CEO Mary Barra is surrounded by media at the debut of the 2015 GMC Canyon during media previews for the North American International Auto Show, Sunday, Jan. 12, 2014, in Detroit. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe 2015 Chrysler 200 sedan is unveiled, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalThe BMW M4 coupe is unveiled at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalHerbert Diess, research and development head at BMW introduces the automaker's new lineup at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalThe BMW M235i is unveiled at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalIan Robertson, member of the Board of Management of BMW AG, Sales and Marketing unveils the automaker's new lineup at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalMatthias Muller, President and CEO, Porsche AG poses in the Porsche 911 Targa during media previews during the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe Porsche 911 Targa debuts during media previews during the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe Chevrolet Corvette Stingray has been named North American Car of the Year while the Chevrolet Silverado has been named North American Truck of the Year at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalA Volkswagen Jetta GLI is shown at media previews at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe Chevrolet Silverado has been named North American Truck of the Year at the North American International Auto Show, while the Chevrolet Corvette Stingray has been named North American Car of the Year at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe Audi exhibit is shown at media previews at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalJournalists walk past the Mercedes-Benz during media previews at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalChevrolet vehicles are shown at media previews at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe Infinity Q50 is shown at media previews at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalJournalists surround the new F-150 with a body built almost entirely out of aluminum at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalChrysler President and CEO Al Gardner introduces the 2015 Chrysler 200 sedans, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalJournalists surround the new F-150 with a body built almost entirely out of aluminum at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalA BMW M4 Coupe is cleaned during media previews at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalIncoming General Motors CEO Mary Barra introduces the 2015 GMC Canyon during the media previews for the North American International Auto Show, Sunday, Jan. 12, 2014, in Detroit. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalMercedes Benz unveils the new C-Class car during a preview night for the North American International Auto Show in Detroit, Sunday, Jan. 12, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalIncoming General Motors head of global product development Mark Reuss talks about the 2015 GMC Canyon at media previews for the North American International Auto Show, Sunday, Jan. 12, 2014, in Detroit. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalGeneral Motors executive chief engineer Jeffrey Luke holds up the North American Truck of the Year award after the Chevrolet Silverado won at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalChevrolet Corvette Stingray chief engineer Tadge Juechter holds up the North American Car of the Year award at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalChevrolet Corvette Stingray chief engineer Tadge Juechter holds up the North American Car of the Year award at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalDr. Dieter Zetsche, chairman of the board of management Daimler AG and Head of Mercedes-Benz Cars sits in the automaker's new C-Class car during a preview night for the North American International Auto Show in Detroit, Sunday, Jan. 12, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalThe 2015 Chevrolet Corvette Z06 is unveiled at media previews during the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalMark Reuss, incoming General Motors head of global product development, introduces the 2015 Chevrolet Corvette Z06 at media previews at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalThe Chevrolet Corvette C7-R debuts at media previews during the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Paul Sancya) (credit:AP)
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Open Image ModalDaimler AG Chairman and head of Mercedes-Benz Dieter Zetsche steps out of the S-Class Coupé concept, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalAlan Mulally, president and CEO of the Ford Motor Co., left, executive chairman Bill Ford, center, and COO Mark Fields stand next to the new Ford F-150 truck at the North American International Auto Show in Detroit, Monday, Jan. 13, 2014. (AP Photo/Carlos Osorio) (credit:AP)
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Open Image ModalChrysler Chairman Sergio Marchionne, left, uses his iPhone, sitting with Chrysler Sr. Vice Pres. for Communications Gualberto Ranieri, right, before Chrysler's press conference, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)
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Open Image ModalChrysler Chairman Sergio Marchionne sits for Chrysler's press conference, Monday, Jan. 13, 2014, at the North American International Auto Show in Detroit, Mich. (AP Photo/Tony Ding) (credit:AP)