E-Class (W211) 2003-2009

rain/light sensor

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Old Oct 16, 2017 | 06:07 AM
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Ahmed Thamer's Avatar
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w211 & c219
Exclamation rain/light sensor

I have problem in my car w211 (E350 2007)

the problem is when I replaced the windshield the light and rain sensor stop working there are no message about rain/ light sensor malfunction appear screen but when I put the light switch auto in the daylight and night the headlamps working and the wiper at the first position working every 10 second. I need to know is the adhesive pad is is important because I did not put the adhesive pad
I replaced the light/rain sensor and replaced Its wires too and checked the fuse but Its not working yet
anyone have same problem? any idea what i should doing ?
thanks all
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Old Oct 16, 2017 | 10:26 AM
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w211 03'
If when installing the windshield they left deris inside the sensor then it is thinking it's night time cause it's blocking the daylight.
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Old Oct 16, 2017 | 10:58 AM
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I took the sensor out and tried it in other position on windshield same problem
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Old Oct 16, 2017 | 11:09 AM
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Have you tried unplugging the sensor, then start the car to see how it reacts, also put your cellphone flashlight on the sensor and see if the lights turns off. If not I think you need a sentry to diagnose or a new sensor.
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Old Oct 16, 2017 | 11:32 AM
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'99 and '05 E55 AMG
Take a look at the .pdf in this post. Might help.

https://mbworld.org/forums/new-m-cla...ml#post5773070
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Old Oct 16, 2017 | 12:21 PM
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I did it too same problem headlight and wiper always working
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Old Oct 17, 2017 | 11:19 PM
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Originally Posted by Ahmed Thamer
I did it too same problem headlight and wiper always working
And you fix it or not?
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Old Oct 18, 2017 | 04:31 PM
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No .. not yet
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