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I have a 2000 Mercedes Benz 320 4 door my horn is not working and also the front passenger window won't work or will work sometimes? Help Gloria

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  • Paul Meyer
    Paul Meyer Dec 08, 2017

    Hi! Gloria. Maybe the fuse is blown for horn.the contacts may be broken or dirty. the horn wires may have come off. the window contacts are probably dirty. get a small sanding board for computer and clean switch contacts. you will have to remove the switch from the housing and carefully clean the contacts. this should work . I had to do the same on my wife's 1990 Mitsubishi pajero swithes. hope all works. good luck

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More than likely the window lift motor is defective and the cause is the brushes are sticking. Other causes are of course the switch and the wiring to the door. The horn needs to be tested, pull it out and hook a jumper to the battery and see if the horn sounds, if it does then you may need to replace the ribbon contact under the steering wheel it has a open filament circuit that is to the horn switch. NOTE always disarm the airbag system before doing any work on the steering wheel.

Posted on Apr 08, 2017

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Posted on Jan 02, 2017

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