Re: (04AudiQuattro)
I am pretty familiar with VAG-COM, there's a whole forum here on Vortex dedicated to it.
VAG-COM will not make your car forget that you screwed it up. It will allow you to clear fault codes. If the sources of those faults are not fixed, then the fault codes return. Also, when you clear fault codes, it resets the readiness code. If a dealership sees that a malfunctioning car has come in, and it does not have the readiness condition set, they can become suspicious and start probing further into the vehicle, and what lead up to the current state. Resetting the engine controller will also reset various parameters such as fuel trim, that a dealer could find suspect, especially in a non-running vehicle.
VAG-COM is a great tool for diagnosing issues with your vehicle, especially if you add modifications like a chip. It isn't a useful tool for deceiving the dealership because you ran the car beyond its capabilities.
Lastly, this forum offers a spell check function. Consider using it. Combined with punctuation, you can convey thoughts in a manner that others can understand.