I have a good idea how things work with them.
Customers making constant contact is not the way to resolve an issue, the dealers need to keep sending in the QCR's and then Germany have to do something.
I phoned and told them about my wheels buckled and what did they say?? we have no issue with RS6 alloys!!
How many people have had buckled wheels???? I know of 4 owners who had at least 2 go on there car
There response was still the same, I gave them information to follow but they only turned to there Tech dept.
As a gesture I got £100 credit to use at my dealer

The DRC issue will just be an on going thing, I'm sure the B7 RS4 boys will be saying the same, I know for a fact they are having issues with the DRC on the B7 knocking and constantly need bleeding out every 3 weeks