I reckon I have sold close to 1,000 audi diesels and in that time Ive bought one dual mass flywheel which strangely was knocking on a low mileage A4 and some of the car that have been through my hands have done over 300,000 miles , one in particular I sold was an a6 1.9tdi avant to a guy in york sold him the car at 100,000 miles, he put the car back in Px against another A6 at the time his car had then done 320,000 miles, he said in that time he had replaced 3 timing belts discs and pads and oil services. nothing had failed was even on the original clutch!! , I sold the car on to a guy in Ireland and as far as I know its still going!
I seriously doubt if the 2.0 tdi that replaced the 1.9 is capable of doing that sort of mileage plus side is they seem to have got it right with the new Cr TDI engine