On Mercedes W204 008 I have problem with rain sensor. It works fine with  windshields, but the automatic ligths doesn´t work, and I get an error- automatic lights no function.

Is that a problem of the sensor or is it something else? I need 100% shure that is a sensor problem.

Can I get a new one, and replace it? Do I need some kind of calibration sensor?

Thank you in advanced.


The sensor serves both functions. It does not mean that becasue it works for detecting rain, it will work properly for detecting light. 

The only way to be sure that the problem is 100% the rain sensor is to hook up your car to Mercedes Star Diagnostics and access the rain sensor. 

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