I was told by my dealer that it would be covered by bodywork warranty only to find out that they put the warranty application in and it was rejected. Apparently the roof rails (drain channel trim) are trim items and therefore not covered, the cant rails (top part between side panels and roof rails) is also trim and again not covered.
Tried calling customer services to query this only to be told they are not technically minded and that the warranty only covered what was galvanised and referred me to audi website. Once I looked at their picture I pointed out that the rails were on the picture and they then more or less said they cant help, bye, great help they are!.
Not sure where to go from here, the Audi 3yr warranty has no problem covering this, the additional warranty such as bodywork or additional years is much more restrictive however I dont know how to get in touch with them to query this as I cant belive they can classify the rusting part as trim.
Would be interested to see if anyone has actually managed to resolve this.