This car has cost me so much. Full synthetic oil changes, premium fuel (I average 17 mpg), and incredibly high maintenance cost. It's a very comfortable car but it's not worth the headaches and repairs. $300 for an O2 sensor, $900 for crank case vent valve, $373 for mass air flow sensor, and now the Cats need replacing....$1600.
Additionally, the value of Touaregs and Volkswagen in general have gone way down due to the emissions scandals--it makes no difference whether your vehicle is a TDI or not.
I ended up selling the car, taking out an unsecured loan to cover the negativity equity ($6200), and then purchased a Jeep. I haven't looked back.
This is my second Touareg, first was a gasoline, 2004, had a few problems as it was the first year out, this car is much improved and a rocket ship, faster than the sister Porsche by .6 second, (Cayenne S), no problems so far in 5000 miles.