PaulWaxy

Hi guys Am looking at purchasing an Audi A4, am going petrol, 2Ltr, looking at Black edition or 2.0 TFSI Dynamik Quattro Is there much difference between the two ? If I went for the 2.0 TFSI Dynamik Quattro on an 11 or 12 plate at between 100,000 and 130,00 is there any potential expensive pitfalls on purchasing? Any common expensive problems on the Quattro? Kind regards, Paul p.s. is the quattro 4 wheel drive? If so, is this switchable to 2WD or permanent 4WF