I had this problem (or certainly these symptoms) and fixed it without the need for expert help. I found the fix on Youtube. If you guys are still experience the problem I'll be happy to explain what I did here (I am a few months late so maybe you have sorted it out!)
Water ingress getting into my TTS Roadster causing the rear of the passenger side floor to become soaking wet
in Audi TT Club
Posted
I had this problem (or certainly these symptoms) and fixed it without the need for expert help. I found the fix on Youtube. If you guys are still experience the problem I'll be happy to explain what I did here (I am a few months late so maybe you have sorted it out!)