Have you checked other forums on what touareg or audi owners say about their 4x4s?? I haven't read of many catastrophic failures on the x5 diesels yet, I suppose do a routine check to see if coolant is up to par as is the oil level, and to be frank it is rare for any vehicle not to have any problem whatsover in it's lifetime, my wifes window mechanism on her 318 i packed in after 45k miles, turned out to be because of crappy quality plastic just gave way under the pressue of the spring at the end of the wires the roll up the window....thing is the n42 engine it has is so sweet.

I must confess the days of simplicity in most cars are gone now, and suppose it is a price we pay literally for all the extra luxuries, the more technology the more can go wrong, but I am sure the safer the cars too, see if you can find the right balance and you will be fine.....I drive the x5 but on my way home everyday I see a toyota landcruiser (1980's) model, and wish I had that too but wife says noooo...and wallet says no as well...gonna start using my moped to work as ironically enough moped owners do not give a damn about cars drivers and before you know it you have a broken wing mirror etc.

Anyway let us know if you find and x5 diesel owner expert or stats on how they rate please????