My wife has a 1999 E320 4Matic, she is complaining about the rain sensor not working [:@]. I drove the car in the rain and she's right. I even removed the dash cover started the car and drove in this greatOragon rain. It does not turn on, sometimes it works a few times then wont turn on again. Is there a sensitivity adjustment or anything anyone can help me with? Used search to no avail in forum already.

 

No clue... I just got a 2001 C240 and I used the VIN decoder and apparantly Mine also has this feature and I have yet to see it turn on..