One problem related to car stall has been reported for the 2014 Audi A8. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2014 Audi A8 based on all problems reported for the 2014 A8.
While driving and getting off a highway exit the vehicle without notice started to stall as if misfiring and running erratic without no engine trouble codes or warning lights at a red light stop. I managed to get home about half mile and once parked couldn't turn the vehicle on. It only cranked and when it did turn on it would shake idle erratic and then turn off. Towed it to the dealer few days later and was told needed 2 new turbos at a cost of $12k. Asked how is that possible and was told they get starved of oil and eventually fail. Thereafter did some research and realized there are countless other in the Audi forums with same issues on the Audi v8 4. 0t engine. There are TSB's from Audi addressing how to fix this problem that it's a small oil strainer problem that gets clogged and starves the turbos and prematurely fail. Audi revised this strainer part it seems but never warned or advised any Audi owners with these engines so it can be changed before it's to late. I know have 2 bad turbos because of this faulty design which creates this major expensive problem for a faulty part that's $20. There should be a recall on this part before it's to late and more damage occurs to other Audi owners with similar engines.