At first I thought a valet left the rear window open, I brought the vehicle for repairs, the carpets were removed and dried and all the electrical was replaced (apparently the majority of it runs underneath the back seat). Yesterday I noticed water had accumulated again.
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2003 Mercedes-Benz CL500 Question: Why is water accumulating on the floor behind the driver seat?
poss heater core is leaking and running back there under the carpet. are you adding water to the cooling system?
Replynew cl500 owner, July 25, 2013, 06:39Rookie
Replyglobalhelper, July 25, 2013, 06:41Master
poss window or door seal leaking?
Replynew cl500 owner, July 25, 2013, 07:16Rookie
No, there's no moisture anywhere except the floor.
Answer #2pushrod July 25, 2013, 06:47Master
No water in front pass side? Sun roof? Only after rain or car wash?
Replynew cl500 owner, July 25, 2013, 07:26Rookie
No, only the back on the floor. However the car was washed at the dealership the day before. Is it possible water is not draining properly and accumulating only in that area?