[pastarocket]

Hmmm. I wouldn't completely trust the service dept. staff at an Audi dealership.
Is it possible that they did not do a complete inspection of the A3?

Have you tried buying a Carfax report on this A3? Perhaps the history of the car can give you a more detailed background of whether this Audi had other damage from previous accidents.

I think that you need more detailed history about this car before you make a decision about whether you want to buy this A3.

Something is not adding up in terms of what the service department staff are telling you about the cause of the road noise.