Long story short. We have been without our 2012 Touareg for 3 months now. We have been to 2 different VW dealerships had both front and rear nox sensors replaced nox catalyst and the dealer is still unable to get the adblue light to turn off. They have been back and forth with VW tech support multiple times emptied and cleaned the tank but still can not figure out why it will not turn off. We are about $4500 into fix and still nothing! Has anyone else experienced this. VERY frustrating!!