Off-again, on-again Audi R8 e-tron ended after 100 built

2017 Audi R8 e-tronThe Audi R8 e-tron—an all-electric version of the German automaker's R8 supercar—is no more. Less than two years after the production R8 e-tron was unveiled at the 2015 Geneva Motor Show, Audi plans to stop building the car. So ends one of the longest and most convoluted development stories of any new car in recent memory. CHECK OUT...