Honestly I wouldn't bother with VW, you may get lucky but they've been a pain with me! Car is 10.5 years old with full extensive history from new all with VW.
I tried to put a claim in but after various contradictions from the local dealer and VWUK they have declined, they brought up the 2 years goodwill a lot too. Their reasons for rejecting were...
- The arch is a moving part (really!??)
- I bought the car sold as seen (how that invalidates warranty I'll never know)
In their words...'The corrosion on your vehicle was caused by a foam pad rubbing on the inner wing. This compromises the protective surface of the paint and moisture enters under the paint. It is,therefore, caused by external factors and is not covered by the 12 year warranty. '
So it was caused by something they fitted to the car but blame it on external factors???
Basically told me if im not happy go to the financial ombudsman. Some people have been lucky though so try and push it! Luckily my drivers arch only has a small amount of rust under the paint so once it breaks through ill buy some genuine wings from TPS and get them done independently, looking about £600 all in for both sides done including blending.