How I replaced the light/rain sensor on my C Class W204. Viewers often ask if the replacement sensor needs calibration. In my case no it didn't. I plugged in the new sensor and everything worked as it should.
My original part # A204 820 8185 for a 2008 built W204
The most up to date part number I found (5 January 2022) was A204 901 78 01
https://partsouq.com/en/catalog/genui....
There maybe further updated part numbers so do some searching.
www.parsouq.com
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