FRANKFURT - SEPT 2015: Audi R18 e-tron quattro presented at IAA International Motor Show on September 20, 2015 in Frankfurt, Germany Stock Photo - Alamy
Audi R18 e-tron Quattro 2015 3D model - Vehicles on Hum3D
New Audi R18 E-Tron Quattro Revealed » AutoGuide.com News
2015 Audi R18 e-tron quattro
Audi R18 - Wikipedia
New Audi R18 e-tron quattro even more efficient | Audi MediaCenter