Hi
Have you had any of the roof mechanism fail? Like the arms? Only was told when i bought my boxster (04) that they had just been replaced after failing. When they snap they pierce the foam water trap thats below them that pools the water and guides it in the rear boot towards the drains. Not long after our British weather changed i noticed the drivers side carpet wet behind the seat and the car inside constantly misting up easy. on investigation i found that when the arms fail the can rip the foam. It took a while to find the hole but by removing the trim from inside the car by the upper seatbelt anchor point i found the hole. These foam seals look a bi#*h to replace so i used a sealer gun & suitable sealer to seal the hole. Up to now the inside has remained dry.
The picture show the arm & foam seals
Hope this helps
