What causes an Audi Convertible with 85,000 miles do this?

Car unexpectedly dies at stopsigns or slow traffic but restarts each time and stays driving as long as you keep speed up. Upon the stops when it dies, the car often VIOLENTLY jerks back and forth as if the axel or gear is having a hard time engaging the Automatic Transmission.What causes an Audi Convertible with 85,000 miles do this?It sound like a torque converter to me. Like sudgested it may be a vacuum leak but if it is when you start it it will have a rough idle, surges. What is happening to you is like comming to the stop sign and pressing the brake without your foot on the clutch. That is was the converter does. Vacuum stall would not lurch the car like that. Need to call Audi and have it towed in. Stop driving it. You don't want to damage your transmission. They are very expensive to rebuild.What causes an Audi Convertible with 85,000 miles do this?Your Audi sounds as though it needs an Audi specialist almost as badly as you need an English language interpreter to describe to the Audi specialist the problems you are having.What causes an Audi Convertible with 85,000 miles do this?Well it could be a couple of things. Vacuum leak, low fuel pressure, bad toruque converter, your best bet is to take it to a good shop and have them look at it.What causes an Audi Convertible with 85,000 miles do this?
sounds like the torque converter