PASSAT B5.5 Water leak in footwell problem

Hello, This is my PASSAT 2.5 V6 TDI 4 Motion (180hp) that I own for almost 10 years now. I never had any problem with water entering or leaking in the vehicle, but last friday when I came in the car to drive back home I heared a strange noise like water was flowing inside. First I thought maybe it's just the gas tank that I am hearing, but the sound was way too loud for that. So i tryed to touch the back side passenger footwell and I felt water ... Good thing that I had a deep cleaner at home, so when I came I sucked out as much water as I could, but I already knew that the water got under the carpet floor already. I did much searching online, here are some links to the site and videos: SITES http://www.edition38.com/forums/index.php?showtopic=486307 http://www.passatworld.com/forums/volkswagen-passat-b5-discussion/283950-water-leak-into-pass-side-rear-floor.html http://forums.vwvortex.com/showthread.php?2215502-Wet-floor-(back-seat-area) http://www.ukpassats.co.uk/phpbb/viewtopic.php?f=8&t=4066 VIDEOs that I found helpful: https://www.youtube.com/watch?v=MnyLZP92MXw https://www.youtube.com/watch?v=W8lAKi1Rx4s https://www.youtube.com/watch?v=4pmXXvI61n8 This one was the most helpfull: http://www.vwaudiforum.co.uk/forum/showthread.php/92293-Passat-water-leaks-wet-carpets So here is the procedure that I took. I am not a professional, just like to do things on my own. The language in Slovenian, but I added subtitles to let everyone understand what is going on. In the video I showed how I dried the interior also. Anyway hope you enjoy it, leave me a thumb up if you did, and thanks for watching.