2005 W202 C240 drivers floor wet/no start - Mercedes-Benz Forum
 
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post #1 of 10 (permalink) Old 06-25-2019, 03:57 AM Thread Starter
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2005 W202 C240 drivers floor wet/no start

Fellas this has to be my worst Mercedes week of all time 😢😢 last night we had a pretty heavy rain in Cleveland. I had the Mercedes parked on a slight incline. Around midnight the neighbor called and said that my car lights were on and she was making a hum noise. I went outside and disconnected the battery. This am I went back out and the drivers floor was soaked. After soaking it up for 10 mins with a towel, I decided to lift the carpet. Wow there was at least 8 ounces, for which I grabbed the shop vac. Now the wiring is runs on the side of the frame by your left foot, and not directly on the floor, but im sure that it must have gotten wet. Does the car suffer ECM damage when this happens? Iím going to take a hair dryer out to try to dry up the area. Please tell me this is not a computer death on the W202.... any insight will be appreciated 😇😇😇😇
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post #2 of 10 (permalink) Old 06-25-2019, 05:00 AM Thread Starter
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I dried the carpet and drained the water. After hooking the battery back up, the headlights came on as soon as I connected the battery. ����*♂️�� Upon turning the key to start, the horn came on like the alarm was going off and the high beam light was on the dash along with a low buzz that I could hear outside of the car.
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post #3 of 10 (permalink) Old 06-25-2019, 06:06 AM
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For starters, it is the wrong forum. However, if the carpet got soaked that bad, there is only one thing I know to do that you will need to do anyway regardless of your electronics problem, and that is to pull the carpet, which means pulling seats and center console. If you dont want to pull the console, at least pull the seats and pick up the carpet and get some fans under it to dry it out. You could have a bunch more water under there shorting out something else, and at minimum if you dont get it out your car will start growing mold under it.

Then of course you need to find the source of the water.

Good luck.
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post #4 of 10 (permalink) Old 06-25-2019, 08:03 AM
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Originally Posted by 4benzes View Post
Fellas this has to be my worst Mercedes week of all time 😢😢 last night we had a pretty heavy rain in Cleveland. I had the Mercedes parked on a slight incline. Around midnight the neighbor called and said that my car lights were on and she was making a hum noise. I went outside and disconnected the battery. This am I went back out and the drivers floor was soaked. After soaking it up for 10 mins with a towel, I decided to lift the carpet. Wow there was at least 8 ounces, for which I grabbed the shop vac. Now the wiring is runs on the side of the frame by your left foot, and not directly on the floor, but im sure that it must have gotten wet. Does the car suffer ECM damage when this happens? Iím going to take a hair dryer out to try to dry up the area. Please tell me this is not a computer death on the W202.... any insight will be appreciated 😇😇😇😇
4benzes,

As George said. You have a w203 - this forum

Do a search in that forum or even the w202, w210 and w163 forum with the term "water in footwell" or similar.
Drainage systems are pretty much similar in all the models across the board.
You find more useful info and solutions.

btw, you're going to need get ALL that moisture out under those HD carpets. Water/moisture gets trapped under there - been there, done it (other members too). Hairdryer positioned under the heavy carpeting at low heat and speed left for and evening might do it, depending on how much water you can get out. And a disinfectant too on the carpets to get rid of the mold mildew smell buildup that comes later.
Most likely, water is coming thru your sunroof drainline (if you have a sunroof) that's clogged/disconnected or thru the cowel (lower windshield) - also clooged up with leaves/debris.

You'll need to check the wiring, electrical boxes under and near the water damaged area, dry it (also use electrical contact cleaner spray, if necessary) to resolve the glitching you are experiencing. It should suffice once the connections/contacts are dried.


GL.
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post #5 of 10 (permalink) Old 06-26-2019, 07:28 AM
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sorry to hear this. your ecm shouldn't be affected. but as you see there are shorts happening. keep the batt unplugged and pull all the seats, carpets, foam etc that may be under there. lots of wires run down there and lots of people have water damage like that and recover fine. you need to dry this out preferable using larger heated fans. if not leave the car out in the HOT summer sun for a couple of days. I have had cars get water inside and after a good drying all was well. if you're quick you won't have to worry about mold.
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post #6 of 10 (permalink) Old 06-30-2019, 07:01 PM Thread Starter
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Thanks All

All is fine, the leak was from the windshield cowl that wasnít firmly seated to the bottom of the windshield. After drying things out by heater and natural sunlight...things are finally back to normal.





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sorry to hear this. your ecm shouldn't be affected. but as you see there are shorts happening. keep the batt unplugged and pull all the seats, carpets, foam etc that may be under there. lots of wires run down there and lots of people have water damage like that and recover fine. you need to dry this out preferable using larger heated fans. if not leave the car out in the HOT summer sun for a couple of days. I have had cars get water inside and after a good drying all was well. if you're quick you won't have to worry about mold.
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post #7 of 10 (permalink) Old 06-30-2019, 07:20 PM
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why did you mess with the windshield cowl?
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post #8 of 10 (permalink) Old 07-01-2019, 05:17 AM Thread Starter
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I guess the better question would be why did the previous owner? LOL I grabbed it a few years ago and never noticed that it wasn’t seated properly.
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post #9 of 10 (permalink) Old 07-02-2019, 02:47 PM
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My guess would be that the w203 have kind of a weird wiper system, and they can have some issues with how the wipers park, and to help diagnose them you have to pull the cowl to get at the wiper motor. I love mercedes, but especially the new stuff can get unnecessarily complicated, which is why I haven't pulled the trigger on a newer one yet.
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post #10 of 10 (permalink) Old 07-03-2019, 07:30 AM Thread Starter
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GeorgeB
The W202 seemed to be more refined than my 203’s. I have had 3 w203’s in the past two years, and each one had broken springs at early mileage. Speaking of gas mileage my W202 was better the pump than my 203’s. God knows that I need to get my diesel back on the road soon 😊
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