i have just come across this thread. I have just this morning collected mine (T32 204) back from the dealer, mine has 3k on the clock, I've had it almost 3 weeks but the disc noise is very irritating, the dealer advised the same corrosion story to me as others have to theirs. I don't accept that for a minute, I've had many vehicles over the years and never had an issue with on going scuffing etc, even when left for weeks, it wears off after 15 minutes or so. i have also noticed that when turning, the noise becomes more prominent. This is the only let down for me on the T6 so far. I do love a challenge so I'll start my battle with VW to have these looked at.