Automatic Windshield Wipers
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E350
Automatic Windshield Wipers
I own a 2009 MB E350:
And, on several occasions, my automatic windshield wipers have automatically begun to operate, even though the weather was "clear and dry" (no rain).
Interestingly, in contrast, the opposite has occurred several times. It begins to rain … but the windshield wipers do not go on automatically.
Has anybody else ever had that problem ?
And, on several occasions, my automatic windshield wipers have automatically begun to operate, even though the weather was "clear and dry" (no rain).
Interestingly, in contrast, the opposite has occurred several times. It begins to rain … but the windshield wipers do not go on automatically.
Has anybody else ever had that problem ?
Senior Member
Joined: Jul 2013
Posts: 401
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From: Cedar Rapids, IA
2009 e550 4Matic
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Joined: Jun 2016
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W211 E270 cdi 2004
Was the windshield ever replaced by you or previous owner? The rain sensor is located just behind the back view mirror (top center of the windshield). Have it cleaned or else you need to calibrate the functionality using Star session.
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Joined: Apr 2007
Posts: 633
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From: USA
2006 E320 CDI
How many strokes does it do when it kicks on? If its just one or two then no worries, because rain isnt the only thing that can trigger the wipers, could be birds crapping, mist kicked up from wind in trees or a reefer truck defrosting down the highway, a goofball spitting out the window in front of you, or a hundred other maybes. But if it comes on and stays on without rain it has an issue. On very rare occasions my wipers wont trigger with light rain so I have to switch them off then back on but there after they work properly, speeding up in heavier rain too. They work well especially with the MB blades 2118202945
Senior Member
Joined: Jul 2013
Posts: 401
Likes: 44
From: Cedar Rapids, IA
2009 e550 4Matic
How many strokes does it do when it kicks on? If its just one or two then no worries, because rain isnt the only thing that can trigger the wipers, could be birds crapping, mist kicked up from wind in trees or a reefer truck defrosting down the highway, a goofball spitting out the window in front of you, or a hundred other maybes. But if it comes on and stays on without rain it has an issue. On very rare occasions my wipers wont trigger with light rain so I have to switch them off then back on but there after they work properly, speeding up in heavier rain too. They work well especially with the MB blades 2118202945
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Super Member
Joined: Apr 2007
Posts: 633
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From: USA
2006 E320 CDI
Do you park under trees? Some trees mist a sap that could fool your sensor, and the sap stays on the window even after multiple wipes, I know its a long shot.
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Senior Member
Joined: Jul 2013
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From: Cedar Rapids, IA
2009 e550 4Matic
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