Seems to be something coming from Audi (at least announcement was done in Germany) to replace parts of the breaking systems.
I have got a TTRS and already called Audi Switzerland... they are not aware of it (not really a surprise then

http://www.auto-motor-und-sport.de/news ... 92557.html
Maybe you are already aware of it..if yes, feel free to delete this post.
BR
Vincent