I have an 08 EOS, and I love it, but the roof (at the rear) bangs like a dunny door when I go over sharp bumps in the road (yes, I know I should avoid them).

When new the roof was as tight as a drum, but now it's really annoying in what otherwise is a class drive.

I spoke to Australs (the local VW dealer), and they did a seal service, but the rattles remain

Any thoughts?