Hi sue welcome to the forum !!
If the mileage is genuine 50k and car has been fully serviced reguarly you really shouldnt have to much to worry about as Audi are built extremely well and with that mileage its barely run in ....
I cant really say ive seen to much posted about the 2.6 v6 having any major engine problems etc !!
You dont state wether its a manual or Automatc gearbox ?? but again should be ok ..
Good luck with the purchase and come back and show us some pics !!
