Engine Shut Off Without Warning problems of the 2006 Volkswagen Rabbit

My 06 vw Rabbit (bought in June, problems started in approx August) will stall or sputter sporadically. This happens usually when waiting at a light, sitting in traffic, or when about to take off and the car is idle. It has happened months apart and sometimes days apart. If the car does not shut off completely it sometimes does a hard jerk back and forth like when you don't ease of the clutch right when driving a stick (this is an a/t transmission) and the rpm's drop to just above 0. The car starts back up after it shuts off however the last couple of times it took several attempts to restart. The very last time the car shut off I was not driving. The car was parked I got in, started it, and it immediately shut back off. Nothing has been done to correct this issue. When I take it to the dealership these things do not happen when they drive it around the block and it was explained to me that the scan codes clear upon restarting the car. I did suggest the next time the car shuts off to have them tow it so that way the codes do not clear out but they did not agree with the suggestion. The only suggestion they can offer me is to wait until it happens all the time.