2015 Audi A8 engine problems

Engine stalled in traffic and car would not restart. Car was operating normally, pulled up to a red light to turn left on to busy 2-lane highway. Engine began sputtering and car lurched forward. Light turned green, was able to turn left on to the road. I got 1/3 mile down the road and the engine stalled completely and would not restart on multiple attempts. Car was disabled and stuck in traffic. Car towed to dealer. Dealer diagnosed failed turbochargers. Car had 68,800 miles on it at time of turbocharger failure.

Regular driving east bound on I-80 and after going up a hill my car couldn't go over 3500 rpms. Thought it was the ECU putting it into limp mode because of weather conditions. Turned out both my turbos blew at 67,000 miles and lead to total engine failure with metal shavings reaching the exhaust and loitering the oil pan.