I have just bought Audi A6 2.5 V6 TDI 235tkm 1998 black metallic from Finland where i live and car cost about 18 000 Euros (Now you start laught, but car are very expensive in here Finland because of taxes)
What I have heard about VAG diesel motors is good and bad, hope this engine will last up to 500 000 kilometres without extra repair costs.
Best Regards,
Vesa since 1981 and working as engineer in material handling of metal and paper industry.