So at that age I'd probably check the servicing, and ensure that the diff and DSG (if it's DSG) have been serviced too. If not, I'd try and push them to be serviced as part of the deal.
Give the tyres a check, see what they are (hopefully they're half decent and the car hasn't been run on a tight budget).
Maybe also check if it's had a replacement water pump. It may not have, but they are common faults and not cheap to replace