^this, pull off the cover, it just snaps into place. see if you can see any marking on the sound deadener and just look for water damage, you can also cut a strip of paper, run a line down the middle of food colouring. let it dry, and then put it under the a pillar cover, the leaking water will streak and show you where its coming from lol. (it works i just did it to a friends car)
4cyl autotragic woes...