As everyone has pretty much stated above; DMF's are an issue with the 1.9Tdi.
I bought mine in 2012 with 38k on the clock, I had a Revo map installed at 50k, along with an injector failure which cost quite a bit to replace.
Now have the dreaded flywheel / clutch judder on idle, so that will need changing and im on 53k miles right now.
If you look after them; regular services with good quality parts and If you get a remap, you feed the power through instead of givin' it full throttle at a low RPM, the car should last a while without things going wrong.
Lovely cars, mine returns 60+MPG on a motorway run, I'm going to remove my mudflaps soon to increase that.
Also stated above, look for a good spec car.
I went for the TDI Match, which has MFSW, ipod dock in the armrest and highline display.