My 2011 TDI has had the check engine light on and off for some time (last 3-4 months). Lately, just on. So I took it in to my dealer in Knoxville. AdBlue heater coil. (Probably the only thing from the entire emissions system that wasn't already previously rebuilt under warranty.) VWoA is comping the replacement. While my dealer was at it, they validated my Good Will program cards and retroactively applied the $1000 to a valve cleaning service on my Eos that was done in December, crediting $1000 back to my original form of payment.