Welcome Lee,
Thanks for being in touch.
It’s time to do some serious homework to best protect your wallet.
Car sales purchase or private?
Mileage?
Have you checked the on-line MOT history, the DVLA vehicle check to see when the last V5 was issued? If recent, it could (just could) have been in short term ownership - not a good sign.
Forget about Apps and e-mail, or even phone calls, but wander into a local Audi dealer and ask if it is possible to have copy of the computerised service history. If it has been averaging <10k miles a year, then it should have had annual services. If more than that, it should have been serviced at around every 18k or 18 months - whichever comes first.
Are tyres matching on the same axle, and do all tyres have near enough the same remaining tread?
Your homework should now lead you to walk away with your hands in your pockets or commit to buy.
If you are tempted to commit to buy, I would recommend you get the car inspected at a trusted independent, local to where the car is being sold.
If you really want to achieve best results from it, I would treat their service as if it never existed - it’s likely to have been treated to the cheapest oil, and a filter from a certain three letter factors.
Buy yourself new oil, air and pollen filters - by Mann or Bosch, and engine oil by Quantum ( VAG’s brand).
I guess you have enough to do so far, so please come back to us when you have made a good start.
Kind regards,
Gareth.