I love my 2009 Audi A4 cabriolet 3.2 but....
After heavy rains, I find a large puddle in the rear passenger side footwell. It is not just damp; it is soaked. I mop the water up and put down the top to dry it out. The windows had not been noticeably open and there were no tell-tale stains or drip marks anywhere in the interior. I chalked it up to maybe not closing the rear window all the way.

Last night it poured and it poured right into my car again. The same footwell had at least an inch of water in it; so much that it had come forward into the front passenger footwell. This time, I had double checked that all of the windows were completely sealed.

I have no idea where the water is coming from. Any thoughts?

 

Check and make sure that the door drains are not plugged.