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