Highlights of the 2013 Frankfurt Motor Show

Chairman of BMW, Norbert Reithofer, climbs out of a BMW i8 Hybrid sports car during the press day of the Frankfurt Motor Show (IAA) in Frankfurt, Germany.  (MAURITZ ANTIN / EPA)

An Audi Nanuk Quattro concept car is presented during the media day of the Frankfurt Auto Show.  (DANIEL ROLAND / AFP/Getty Images)

An Audi Nanuk Quattro concept car is presented during the media day of the Frankfurt Auto Show.  (DANIEL ROLAND / AFP/Getty Images)

The new Nanuk Quattro by Audi is pictured during the press day of the Frankfurt Auto Show.  (FREDRIK VON ERICHSEN / EPA)

An Audi Nanuk with open gull-wing doors is shown during the press day of the Frankfurt Auto Show.  (BORIS ROESSLER / EPA)

A model stands by the new Audi Nanuk concept car at the Frankfurt Auto Show.  (Thomas Lohnes / Getty Images)

The new Mercedes-Benz S-Class Coupe concept is presented at the 2013 Frankfurt Auto Show.  (UWE ZUCCHI / EPA)

An S-Class Coupe concept by Mercedes-Benz is presented during the media day of the Frankfurt Auto Show.  (JOHANNES EISELE / AFP/Getty Images)

Chairman of Daimler AG, Dieter Zetsche, presents the new S-Class Coupe concept at the exhibition booth of Mercedes-Benz during the Frankfurt Auto Show.  (DANIEL REINHARDT / EPA)

The Lexus LF-NX concept is presented at the 2013 Frankfurt Auto Show.  (ULI DECK / EPA)

The new Infiniti Q 30 concept car is displayed during a press conference of Infiniti at the 2013 Frankfurt Auto Show.  (DANIEL ROLAND / AFP/Getty Images)

The new Mercedes GLA is seen at the Mercedes Benz booth at the Frankfurt Auto Show.  (DANIEL REINHARDT / EPA)

An Audi quattro sport concept hybrid car is presented during the media day of the Frankfurt Auto Show.  (DANIEL ROLAND / AFP/Getty Images)

An Audi quattro sport concept hybrid car is presented during the media day of the Frankfurt Auto Show.  (DANIEL ROLAND / AFP/Getty Images)

The new quattro sport Concept by Audi is pictured during the press day of the Frankfurt Auto Show.  (FREDRIK VON ERICHSEN / EPA)

Matthias Mueller, member of the board of directors for strategy of Porsche and CEO of Porsche AG, presents the new 918 Spyder car during a press conference at the Frankfurt Auto Show.  (JOHANNES EISELE / AFP/Getty Images)

A Jaguar C-X17 is presented during the first press day of the 65th Frankfurt Auto Show in Frankfurt, Germany.  (Michael Probst / AP)

Chairman of the board of Daimler AG Dieter Zetsche presents the new Mercedes S-Class Coupe concept car at the Frankfurt Auto Show.  (Thomas Lohnes / Getty Images)