Do not remove the felt seal strips. If you think you have a leak now, just wait. The wind noise will be spectactular as well. Your drains are plugged. I have seen the 280 setup and it looks like they are in the rear lateral gutter area when the roof is retracted. Try pouring some water in the gutters around the panel and see where it goes. Should run off to the rear and disappear. If not, call roto-rooter
. Not sure of the safest way to clear the blockage in your car, but, I cleaned my 300e drains with those long chenelle strips (like pipe cleaners only long). Got them at a local craft store. Good luck..
2000 Dodge Grand Caravan SE