sghokie

If I put my wipers on either of the intermittent settings they seem to work okay for about 10 seconds when it is raining then the wipers start going into ludicrous mode.

I really hate my wipers when it rains because I end up just pressing the single use button all the time. How can I get the rain sensor to work properly?

The G Man

Have your windshield been replace before? Did you try cleaning your windshield area where the sensor is located.

sghokie

Its the original windshield I think. Window is clean. This has been happening for over a year now.

thefisch

Happens to me from time to time. Usually turning off and then back on gets it back to non-ludicrous speed.

sghokie

If I turn it off and back on it works again for 10 seconds again then goes to ludicrous speed.

jumpman726

Sounds like there might be a problem with the camera/sensor and it thinks that it's pouring heavy rain which is causing the wipers to go in "ludicrous speed."

gcssat

I just couldn't resist!

sghokie

LOL.
Is the camera fixable?
Or do I just have to wait until my Tesla Model 3 is ready?

KEY08

Yep, turn off then on. Every MB I have owned has had this issue. I have concluded that the system has always been problematic and never addressed properly by MB over the years.

sghokie

I had an 03 c320 and the rain sensor worked okay.

sghokie

I just took off the sensor and cleaned the 4 lenses and the windshield inside and tested.

Same result.

konigstiger

Have someone pull /clear fault codes with MB SDS. Need VIN to supply rain/light sensor part # if replacement needed, removal: http://workshop-manuals.com/mercedes...ons/page_1845/

sghokie

Its pretty easy to remove. I just took it off today.

I suspect it is bad.

aquinob

I have the same issue. Will try the shut on and off and see if it makes a difference. But I see this as just another bit of MB over engineering, a much simpler system that would let you set a time delay for each wipe would be bulletproof. Coming from a '98 C that used vacuum for everything and of course didn't work all that well after years, its nothing new either.

konigstiger

Another member posted this reset, consider this before replacement.

sghokie

Thanks, I will try that.

sghokie

I tried the reset procedure during a rain event last week, and ironically the wipers worked fine all the way home. Unfortunately this morning they decided to not work again.

So I guess it needs to have a new rain sensor.