I have a 2.0tdi. The only thing I have had to do to mine is replace the rear springs.
Check the ride height at both sides, have a feel around the bottom of the rear spring, you usually find the bit in there. Apart from the normal things. Log book, VIN number being the same and service history that's about it. Go for a test drive check the brakes then drive with full lock to check the CV joints.
Enjoy ;-)