So, on my second A3 now and the other one did exactly the same after about a month: rattling/noisey rears seats. Or a "chattering" sound the technician described it on my last car. Is this yet another "feature" of Audi cars and their apparent poor build quality. [Waiting for the doors to start creaking at the moment... ] Seems odd that the car is absolutely perfect for a month, then it all just goes wrong. Anybody else had the rear seat problem?