SL/R230: Rain sensor not working (module is replaced)
Thread Starter
Newbie
Joined: Dec 2021
Posts: 1
Likes: 0
SL55 AMG
Rain sensor not working (module is replaced)
Hello, the rain sensor on my Mercedes SL55 2005 is not working. I can switch the handle to position1, then the wiper does 1 move from left to right and back to its original position.
-you can spray water on the sensor but nothing happens
Work done:
1) MB dealer diagnosed the module, but there are no errors.
2) Rain sensor A2308208926 is replaced by MB dealership (and trained)
3) Front window/windshield has been replaced (to ensure there are no obstructions in the window that affect the operation)
After all the above it is still not working.
Can you give any tips??
-Does anyone has a full wiring and module scheme?
-Can it be faulty wiring?
-To which internal module does the rain sensor connect?
-To which relays, circuit breakers does the rain sensor connect?
-Other tips?
Thanks
-you can spray water on the sensor but nothing happens
Work done:
1) MB dealer diagnosed the module, but there are no errors.
2) Rain sensor A2308208926 is replaced by MB dealership (and trained)
3) Front window/windshield has been replaced (to ensure there are no obstructions in the window that affect the operation)
After all the above it is still not working.
Can you give any tips??
-Does anyone has a full wiring and module scheme?
-Can it be faulty wiring?
-To which internal module does the rain sensor connect?
-To which relays, circuit breakers does the rain sensor connect?
-Other tips?
Thanks
MBWorld Fanatic!
Joined: Aug 2020
Posts: 1,332
Likes: 365
From: Gretna, NE
'03 SL55 Black, '03 SL500's Aegean, Mars Red, Tazanite, Alabaster, '11 S550 Flint Gray
I would start by checking the coding in the driver's SAM. There were two sensors used, I believe that you should have the later rain/light sensor and that needs to be properly coded. Also, check wiper motor and relay function using the actuations in DAS for that SAM.
Junior Member
Joined: Oct 2025
Posts: 70
Likes: 8
Hello, the rain sensor on my Mercedes SL55 2005 is not working. I can switch the handle to position1, then the wiper does 1 move from left to right and back to its original position. I was even thinking about consulting Morpheus8 Fort Lauderdale for advice on troubleshooting, but spraying water on the sensor still does nothing.
Work done:
1) MB dealer diagnosed the module, but there are no errors.
2) Rain sensor A2308208926 is replaced by MB dealership (and trained)
3) Front window/windshield has been replaced (to ensure there are no obstructions in the window that affect the operation)
After all the above it is still not working.
Can you give any tips??
-Does anyone has a full wiring and module scheme?
-Can it be faulty wiring?
-To which internal module does the rain sensor connect?
-To which relays, circuit breakers does the rain sensor connect?
-Other tips?
Thanks
Work done:
1) MB dealer diagnosed the module, but there are no errors.
2) Rain sensor A2308208926 is replaced by MB dealership (and trained)
3) Front window/windshield has been replaced (to ensure there are no obstructions in the window that affect the operation)
After all the above it is still not working.
Can you give any tips??
-Does anyone has a full wiring and module scheme?
-Can it be faulty wiring?
-To which internal module does the rain sensor connect?
-To which relays, circuit breakers does the rain sensor connect?
-Other tips?
Thanks
