Go over the car properly, you will see if it has been touched up from anywhere else as silver colour is very, very hard to match and you can spot the rear bumper is off shade than the whole of the car.
If you want a TDI, Buy the 1.9 TDI, there better than the 2.0 TDI engines. Alot better.
Also note if this has DPF?, coz you can run into alot of problems if you get one with DPF.