When it rains hard, there is an accumulation of water in the rear. Doors, when I open the doors, a significant amount of water that has accumulated on the sill comes out , at least a glass full. I have gone to the dealer 5 times They have changed seals and weather stripping. It just rained hard today and it is not fixed The doors are flush And the seals on the. Windows are good How can the water come In and not. Drain out by itself it should drain out by itself and not just when I open the doors. Just the back doors. I have been to dealer 5 times with this and they have not fixed it. My concern is that it will eventually rust out. What could the problem be and what is the fix???