2012 A3 Cabriolet - leaking

[Woosie]

Has anyone experience and success in resolving A3 Cabriolet leaks ? I have identified the area which causes the leak which is the moulding area above the small collection drain box at the rear wing quarter. The leak collects in the rear inner wing on the nearside at the very rear of the boot. I would be quite happy to take it to an Audi main dealer if they could help but so far no real enthusiasm from my local ones.