• Audi Test Audi R18 e-tron quattro
  • Audi Test Audi R18 e-tron quattro
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Every year at every auto show we see concept cars that envision replacing the rearview mirrors with digital cameras. They're usually the exterior mirrors and not the central one above the windshield, but whatever the case, and however much sense they seem to make, government regulations prevent them from being put into production. But Audi has found another use for the idea: its racing cars.