2001 Audi S4!!!!! Has anyone encountered water leaking into the rear passenger floorboard when it rains? I have had several mechanics look for the problem and they have not been able to identify it. I was told it may be a sunroof drain...where is it located? There isn't any water damage that I have found in the headliner. Any help will be greatly appreciated.

 

I had the exact same problem in my old car. Unfortunately, I was never able to fix it (my car got totaled while I was in the process of figuring it out). The sunroof drains are visible when the sunroof is open. They are located in all four corners. It could also be a clogged drain under the battery. Here is a link to a solution for that: http://www.weirdlittlebiscuit.com/passat/leak/ This is for the passat, but they are the same cars. Good luck!

 

Great, thanks for the link, I will look into that as well.