One problem related to car throttle stuck has been reported for the 2009 Audi S8. The most recently reported issues are listed below.
2009 Audi S8 throttle stuck wide open while accelerating onto highway. Full breaking did not disconnect throttle. Braked hard and pulled to side of road and shut down engine. Had towed into miramar Audi, san diego. Audi America brought in and blamed floor mats. I paid $2300 to replace throttle control modules after Audi refused to do so.