BenzWorld Junior Member
Date registered: Dec 2009
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Water on the floor is often a result of a leaking moonroof
A moon roof cannot totally seal out rain water - so, it must allow the water to drain faster than it enters. This is done by small holes connected to drain hoses on the left and right side (you can see them when the roof is opened).
The hoese are routed down each A pillar. If you have a leak on the floor, it is very possible that water is overflowing on that side, and following the hose down the A pillar (on the outside of the hose), and ending up on the floor. I had this experience, and solved the problem by removing an oval shaped Elm seed that was lodged in the drain. I pulled out the seed - problem solved.