Hi all, I need a bigger car (have a Bora at the moment) and I am going to look at an A6 2.5TDi Quattro (2001) in the next few days. Having owing a petrol, could I get any advice from you guys about checking a TDi? What should I look for? What symptoms do failing Turbo have? Anything else that I should pay attention to? How do I test if the Quattro system is working? Thanks in advance.