Water on floor after heavy rain

NASER NASER

MEMBER
2008 MERCEDES BENZ C350
6 CYL
2WD
AUTOMATIC
126,000 MILES

Had heavy rains today and the passenger side floor was wet and the water would also create a puddle in the back. I replaced the cowl a month ago because water was leaking inside on driver side floor and that solved it.
I gave it to my brother to drive for a week and he told me about the water just now, where could the water be coming from on passenger side? I confirmed with him that it is cold water so from the rain not engine. Thanks

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi,

Do you have a sun roof? There are drains on both the left and right side. Here are directions for replacing the drain. I'm adding all of it to help locate and inspect.

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2008 Mercedes Benz C 350 (204.056) V6-3.5L (272.961)
AR77.20-P-1997CW Remove/Install Water Drain Rail For Sliding Roof
Vehicle Body and Frame Roof and Associated Components Sunroof / Moonroof Sunroof / Moonroof Drain Service and Repair Removal and Replacement AR77.20-P-1997CW Remove/Install Water Drain Rail For Sliding Roof
AR77.20-P-1997CW REMOVE/INSTALL WATER DRAIN RAIL FOR SLIDING ROOF
AR77.20-P-1997CW Remove/Install Water Drain Rail For Sliding Roof
MODEL 204.0 /2
- with CODE (414) Power glass tilting/sliding roof
MODEL 212
- with CODE (414) Power glass tilting/sliding roof up to model year 2011

pic 1

Shown on model 204.0

1 Water drain rail
2 Tilting bracket
3 Slider

pic 2
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Next, if he was using the defroster or AC, it could be a leak from the evaporator drain. Check under the dash to see if that is where is seems to come from.

Let me know.

Joe

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Water on floor after heavy rain

1 Reply

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