Why don't you take advantage of the Audi week insurance and ask the dealer to deliver to your driveway under trade plates a week before Sept 1 .My car is registered on 1/09/12 but it gives me a week to play with the car ,temptation to drive will be great but at 00.01 on the first I can drive away.I'd rather have the car in my drive or actually in my garage than risk denting in some dealers car park.
I had never even thought of that. As you say it gets it out of their way (less chance of damage) with one less car to prepare and deliver on the 1st. I have no part-ex so that is not an issue either. I would just have to move finances about sooner.
Seeing the dealer over the weekend, so I will just ask the question.