My wife's 1998 C280 driver seat floor and rear floor keeps getting soaking wet. I put the car on a lift to check it out and I could not find any place where the water could enter. I have to use a wet vac to get it out. The flat surface is the only part that is wet. If you have had this problem or know what i should check it would surely be appreciated. It has been raining here a lot in The Pacific Northwest. There are no indication of the door seals leaking.