If it is a coil pack failure, then I wouldn't wave your finger too vigorously at VW. OK, they have been pretty pants so far in trying to sort it - but it seems that any other manufacturer, with the exception of Japanese, would be treating the same, or even worse.
Obviously, VW don't make the coils. The current batch are made by Beru. I had one go on my last S4, though I put that down to the sheer muppetery of the stealer who serviced it - by filling the coil recess with engine oil.
