Automatic Transmission problems of the 2002 Audi A6

Own 2002 Audi A6 3. 0 liter sedan. Module(computer) replaced and complained of transmission not working properly. Brought auto back to dealer and after checking the transmission found nothing wrong. Transmission still not working properly. When put in drive auto doesn't move forward. Have to play around with lever from reverse to drive to engage the transmission. When it moves forward it lunges not smoothly. Not safe driving.

Whenever I attempt to accelerate immediately after using the brakes, nothing happens. The car's throttle appears to have no effect for 2+ seconds, even when pressed all the way to the floor. On several separate occaisions, while trying to merge into traffic, I have nearly been hit by an oncoming vehicle while waiting for my car to understand that I intended to accelerate. This is not turbo lag; it is computer-induced throttle lag. (the engine rpms do not change during these occurrences. ) this is a clear safety issue that Audi must address. (a representative of my dealership told me he is quite aware of the problem and has personally experienced it. But Audi informed him it does not see this as a problem. ).