I have water ingress that is soaking the carpet around the 2 rear mounting points (where the seat bolts to the floor) of the right hand (drivers) front seat of my '92 300TE-24. The mount areas are recessed, so I'm getting two nice little ponds forming. The left hand side is dry. The rest of the carpet is also dry, including the area between the rear mounts where the heater outlet is located. and it only seems to happen when the car is moving? I've done a search, but can't seem to come up with anything.