19 Audis Aspen Tdi Clean Diesel Dinner Stock Photos, High-Res Pictures, and Images - Getty Images

Juan Bollini, Melissa Ganzi, Zac Efron and Kris Kampsen attend Audi's Aspen clean diesel event on December 20, 2009 in Aspen, Colorado. Get premium, high resolution news photos at getty

Audi Clean Diesel Dinner Inside Photos and Premium High Res Pictures - Getty Images

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These Audi TDI clean diesel ads are coming back to bite the company

47 Audi R8 Tdi Stock Photos, High-Res Pictures, and Images - Getty Images

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47 Audi R8 Tdi Stock Photos, High-Res Pictures, and Images - Getty Images

47 Audi R8 Tdi Stock Photos, High-Res Pictures, and Images - Getty Images

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Audi Clean Diesel Dinner Inside Photos and Premium High Res Pictures - Getty Images

Audi Clean Diesel Dinner Inside Photos and Premium High Res Pictures - Getty Images

Audi powers into diesel market

Audi Clean Diesel Dinner Inside Photos and Premium High Res Pictures - Getty Images