Hi Simon
ive just recently purchased a A4 Avant 2L TFSI 2010. I was a wear of the oil consumption issues as I had seen this on a watch dog programme last year. I wanted to be sure that the Issue when purchasing my new car had been rectified.
Luckily the one I now have did. The previous owner had always serviced it with Audi therefore when he went to Audi with this issue they changed the cod rods ring etc. As it was fully serviced with Audi it was done free of charge.
in your case I'm not sure where you stand as it doesn't have full Audi service history.
Hope this info helps mate
scott