Hello, first of all, I’ve already used the search but unfortunately I didn’t find the right one, so again the topic… Sorry already if I missed something… but it’s a bit rushing… So the following problem: The rear carpet in the Audi 80 Limo, BJ 92 , 2,3 Quattro , MKB : NG is dripping wet on the passenger side. I just don’t know exactly where to start looking. At the front it seems to be a bit wet, but rather humid. The heat exchanger does not seem to be. Cooler water level is constant. But after the last days it has poured properly, it has become even wetter in the interior. As I said, only on the floor of the passenger side and mainly in the back. The car was not moved during the rain and only stood. Water box and pollen filter box, (without pollen filter, only fan) I could not notice anything or what I have to pay attention to there? I suspect the sliding roof, but where I start looking at and where it comes out inside if it is possible?