I think where I live I'm probably not going to get much better to be honest, I live in a valley so as you can imagine lots of ups and downs. Also think that the Quattro version that I have is never going to be as good as a FWD that I'm assuming you have?
It has full Audi service history and 1 owner from new so the Audi dealer servicing the car was always the same one as well. I've ordered all the service bits to do it on Saturday but will have a look at the air filter this evening to see whether it has been changed. According to the schedule it should have been done at 60,000 and Audi last had it in at 62,000 but it doesn't mention the air filter.
Edit: the previous owner had never reset the long term trip computer and over 67,000 miles it only averaged 38. It has risen now and did on the way home the day I bought it, obviously I've reset it now as I had updates done to the VC.