While traveling at approximately 40 mph, a warning message came up do the dashboard saying "gearbox malfunction, reverse gear not available, you can still drive". at the same time, the TPMS warning indicator came on. The car began to loose speed and wouldn't respond to the throttle, after a few seconds it would surge forward, and then loose speed again. This repeated a few times, until I came to a stop at an intersection. At the intersection, I turned off the ignition and restarted the car. The car behaved normally for about 25 minutes of driving. Then on the freeway at about 65 mph the problem recurred. I was able to limp to the nearest Audi dealership, where the car is now being evaluated. I'm very concerned about this issue, because at times I was unable to maintain the same speed as the flow of traffic and an accident could have occurred.

- Thousand Oaks, CA, USA

This issue concerns my Audi 2011 S4, a car that I took delivery on in April, 2011. I have had numerous problems with the car since the delivery, however, it is a safety concern that has caused this specific filing. The problem seems to be with the dsg transmission. On occasion, the car will struggle and "buck" in low gears at a very slow speed (or froma complete stop) upon acceleration. This does not happen often but it has happened several times since taking delivery. I have tried addressing the problem with Audi coral springs in the past but because I cannot duplicate the problem, they are unable to help. Consequently, I have not been able to always drive the car in the manner that I would like to. However, on October 9, 2012, the problem happened again, only this time, it occurred while attempting to merge into traffic. I was in a merge lane, traveling approx 3-5 mph and when the opportunity arose, I accelerated into the traffic. At that precise moment, the car bucked violently (as it has done in the past) and I had to lift off the throttle to correct the issue. Let me express that I in no way am attempting to cause problems for Audi. I am only concerned for my safety. Its quite conceivable that when my car has this trouble while merging into traffic that I could get hit from behind as I must immediately lift off the accelerator to resolve the issue.

- Coconut Creek, FL, USA