after doing a fair amount of research on an 04 touareg ( beautiful car ) I came to the conclusion that it was a safe bet that all it needed was the codes cleared and I would have a high end suv for cheap. 600 used. After 250 usd in diagnostic and alot of head scratching , I gave up. Took it to a mechanic who promised the world and delivered nothing. Another 300 used. Are all VW mechanics Schuster? I think I learned enough in these forums to know when I an being lied to and they were laying it down thick. So now I'm into it for 1200 with no progress towards the fix. Selling the cats ( cali ) and let pick a part have it. I loose a couple hundred and never got to drive it. Hopes this helps someone with a bright idea like me.