Hey forum, my really nice automatic windshield wipers quit working.
I still have all speeds, and intermittent, but that really cool rain sensing feature quit.
I ( being an old time American car owner ) swapped the sensor on the inside of the windshield, but it did not help. ( slightly used rain sensor for sale cheap.)
I have heard that the relays go out on these.
Is there a like test procedure to nail down exactly the faulty part?
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The finest example of automobile engineering in the world
Floats like a CADI
Stings like a BMR
Stingy as a Prius
and.... all Mercedes Benz.
Rain sensing wipers, or not! 
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