Daimler AG Chairman and CEO Dieter Zetsche greets singer Bruce Hornsby

DETROIT, MI - JANUARY 14: Daimler AG Chairman and CEO Dieter Zetsche greets singer Bruce Hornsby after Hornsby performed at the world debut of the new 2014 Mercedes-Benz vehicles at the 2013 North American International Auto Show media preview at the Cobo Center January 14, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

Daimler AG Chairman and CEO Dieter Zetsche

DETROIT, MI - JANUARY 14: Daimler AG Chairman and CEO Dieter Zetsche attends the world debut of the new 2014 Mercedes-Benz E63 AMG at the 2013 North American International Auto Show media preview at the Cobo Center January 14, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

Hyundai HCD-14 Concept Vehicle

DETROIT, MI - JANUARY 14: The Hyundai HCD-14 concept vehicle is revealed at the 2013 North American International Auto Show media preview at the Cobo Center January 14, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

John Krafcik, President and CEO Hyundai Motor America

DETROIT, MI - JANUARY 14: John Krafcik, President and CEO Hyundai Motor America, reveals the Hyundai HCD-14 concept vehicle to the media at the 2013 North American International Auto Show media preview at the Cobo Center January 14, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

Mike Manley, President and CEO Jeep Brand

DETROIT, MI - JANUARY 14: Mike Manley, President and CEO Jeep Brand, introduces the new Jeep SRT Grand Cherokee as it makes its world debut at the media preview of the 2013 North American International Auto Show at the Cobo Center January 14, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

Ford Motor Company CEO Alan Mulally (left) and Ford Chairman Bill Ford (right)

DETROIT, MI - JANUARY 14: Ford Motor Company CEO Alan Mulally (left) and Ford Chairman Bill Ford (right) wait for the start of the reveal of the new Lincoln MKC crossover concept vehicle during its world debut at the media preview of the 2013 North American International Auto Show at the Cobo Center January 14, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

Ralph Gilles, President and CEO SRT Brand and Motor Sports, Chrysler Group LLC

DETROIT, MI - JANUARY 14: Ralph Gilles, President and CEO SRT Brand and Motor Sports, Chrysler Group LLC, introduces the new Jeep SRT Grand Cherokee at its world debut at the media preview of the 2013 North American International Auto Show at the Cobo Center January 14, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

The Nissan Resonance Concept

DETROIT, MI, - JANUARY 15: The Nissan Resonance Concept hybrid-electric vehicle is revealed at the 2013 North American International Auto Show media preview January 15, 2013 in Detroit, Michigan. Approximately 6000 members of the media from 68 countries are attending the show this year. The 2013 NAIAS opens to the public January 19th. (credit: Bill Pugliano/Getty Images)

Dr. Andy Palmer, Executive Vice President Nissan Motor Company

DETROIT, MI, - JANUARY 15: Dr. Andy Palmer, Executive Vice President Nissan Motor Company, introduces the new Nissan Resonance Concept hybrid-electric vehicle during its reveal at the 2013 North American International Auto Show media preview January 15, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

(L to R) Dr. Andy Palmer, Al Castignetti and Shiro Nakamura

DETROIT, MI, - JANUARY 15: (L to R) Dr. Andy Palmer, Executive Vice President Nissan Motor Company, Al Castignetti (C), VP and General Mgr Nissan Division, and Shiro Nakamura (R), Senior VP Nissan Division, pose with the new Nissan Resonance Concept hybrid-electric vehicle at its reveal at the 2013 North American International Auto Show media preview January 15, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

Mark Templin, Lexus Group Vice President and General Manager

DETROIT, MI - JANUARY 15: Mark Templin, Lexus Group Vice President and General Manager, introdudes the Lexus IS 350 F Sport (white) and the IS Hybrid (red) at their world debut at the 2013 North American International Auto Show media preview at the Cobo Center January 15, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

The Lexus IS350 F Sport

DETROIT, MI - JANUARY 15: The Lexus IS350 F Sport makes its world debut at the 2013 North American International Auto Show media preview at the Cobo Center January 15, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

Nissan Versa Note

DETROIT, MI - JANUARY 15: The Nissan Versa Note is revealed at the 2013 North American International Auto Show media preview at the Cobo Center January 15, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

The Volkswagen Exhibit

DETROIT, MI, - JANUARY 15: Vehicles at the Volkswagen exhibit are shown prior to the start of the 2013 North American International Auto Show media preview January 15, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

The SMART Exhibit

DETROIT, MI, - JANUARY 15: A portion of the SMART exhibit is shown at the 2013 North American International Auto Show media preview January 15, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

2014 Acura MDX Prototype

DETROIT, MI, - JANUARY 15: The 2014 Acura MDX Prototype is revealed at the 2013 North American International Auto Show media preview January 15, 2013 in Detroit, Michigan. Approximately 6000 members of the media from 68 countries are attending the show this year. The 2013 NAIAS opens to the public January 19th. (credit: Bill Pugliano/Getty Images)

The Maserati Exhibit

DETROIT, MI - JANUARY 15: A model stands at the Maserati exhibit at the 2013 North American International Auto Show media preview at the Cobo Center January 15, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

The Acura NSX Concept

DETROIT, MI - JANUARY 15: The Acura NSX Concept is shown at the 2013 North American International Auto Show media preview at the Cobo Center January 15, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

North American International Auto Show Floor

DETROIT, MI - JANUARY 15: Exhibits at the 2013 North American International Auto Show media preview are displayed January 15, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

The Mazda Exhibit

DETROIT, MI - JANUARY 15: The Mazda exhibit is displayed at the 2013 North American International Auto Show media preview January 15, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

The BMW Concept 4 Series Coupe

DETROIT, MI - JANUARY 15: The BMW Concept 4 Series Coupe is displayed at the 2013 North American International Auto Show media preview January 15, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

The Audi Exhibit

DETROIT, MI - JANUARY 15: A portion of the Audi exhibit is seen at the 2013 North American International Auto Show media preview January 15, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)

Audi R8

DETROIT, MI, - JANUARY 15: The Audi R8 is shown on display at the 2013 North American International Auto Show media preview January 15, 2013 in Detroit, Michigan. (credit: Bill Pugliano/Getty Images)