I was working on my teg last night, and found a deep pool of water down by my spare tire, as well as water collecting under the rear seat carpet, and under the passenger seat as well.....I think in my case, it must be more than just the moonroof drainage tubes. I figured it was coming in from around the hatch where the weather stripping has worn down, but I have no idea...
Out of curiosity, what diameter are the drainage tubes? When looking in the back near my tail lights underneath the side panel, I noticed two plastic tubes, one connected to my antenna motor, and another I to which couldn't find either end (runs from the front of the car to the rear, in between an inner and outer metal panel not easily accessed). They definitely look like they are used for plumbing, but I couldn't see them very well...