If I can add my recent purchase experience,
One month ago I paid £10,200 for a carbon grey 10 plate 5 door GTi, 60k, day two of ownership engine light came on, car was due a service so booked it in, and asked them to investigate, service completed and advised I required a new MAF, sourced one from VW, fitted, car running ok, another day passed, light comes on again, took it to another garage, they diagnosed air/oil separator required replacement, I had them inspect the cam chain tensioner too, and it was one of the early failure prone items, so I elected to have chain, tensioner, guides etc replaced, collected car last week, drove it 50 miles home, engine light back on! It's now back in the workshop waiting on a new inter cooler to arrive!! Great cars to look at, but I've spent around £1500 in 4 weeks since purchase! buyer beware!
Ps my cam chain cover showed signs of chain slap, so was only a matter of time before my chain slipped!