I'm also interested in your latest venture .. "Mods in progress: Driver's seat memory " ;-)Aux Heater went into Component Protection, this is the cause for the error on the Auto HVAC Controller.
You have to go to an Audi Service to remove the CP on the Aux Heater, There is no other way.
Hmm funny that .. my car was stolen and recovered april this year (thanks to Tracker) !!!!Even with VagCom, CP can be removed only by VAS Diagnosis System with an online connection to Audi in Germany.
VAS is checking if the component is flagged as being stolen or coming from a stolen car. Only when receives authorization from the Audi Server the CP can be removed.
The "next venture" is scheduled for the beginning of 2011 and i guess ill do it in February as in January my car is scheduled for alcantara linings.
Neo I have been using the aux heater this winter and it has been really useful.You can add the remote control now for the aux heater, which is not a hard to do retrofit, nor expensive as you can find the required parts on ebay.de
Neo,Aux. Heat Adaptation Ch.3
1=Aux Heat will run until preset timer runs out
2=Aux Heat will turn OFF if ENGINE WILL TURN OFF.