Hi,
heres what I found out looking for mine.
1. Do you want a std car or a tuned one?
Std then get a low miles Std one. Must be serviced at 10K, no exceptions or warranty will be voided.
2. Audi specialist inspection + full HPI (
www.hpicheck.com) including mileage check is money well spent.
3. RAC inspection includes HPI and "warranty" and valuation. IMHO go with 2.
4. Most tuning invalidates the Audi warranty, although some Audi dealers have approved tuning options, at a premium naturally.
5. Known faults seem to affect low, medium and high mileage cars equally. TBB (split) is the most often seen issue along with DV (split).
6. Large BHP figures requires large bank accounts.
7. High miles, well maintained is no problem. A well maintained car will have full receipts, service history etc..
8. If you want a tuned one probably better off buying a tuned one, make sure it's all documented including wheel HP figures not adjusted ones.
9. Audi customer services will check car history for you FOC.
10. Blown turbo's and gearboxes are big money.
11. Fantastic car fast comfortable and very stealthy.
12. Audi warranty isn't cheap. Expect 500-800 per annum depending on age mileage.
13. Take your time, took me 5 months to find what I was looking for. You have a head start though as I found this forum after buying my car.
14. Try to get a local meet. If possible try to get a few owners to take you out in their cars.