How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Mike Your Own Question

Mike
Mike, Mercedes Technician
Category: Mercedes
Satisfied Customers: 39198
Experience:  Tech Expert
9261905
Type Your Mercedes Question Here...
Mike is online now

My E200 windscreen wiper comes on automatically [unless it

Customer Question

My E200 windscreen wiper comes on automatically [unless it decides not to!] is this a maintenance/cleaning issue or does the switch arm need renewing and how do you do either
Submitted: 3 years ago.
Category: Mercedes
Expert:  Mike replied 3 years ago.
Hello and Welcome to justanswer..

My name is MIKE - Im happy to help / advise you on this...

This to be honest on this model / year, is usually a fault on the switch itself... the switch tends to go faulty internally and with the ign on that means that usually with the vibration of the car, it causes the contact to "Make" - and hence it comes on.

Because of the way they are wired though - it can be a motor fault... so, what I suggest you do is check / have the switch checked out first - as thats the common issue - but if its not that , check the relay / wiper motor next.

It wil be one or the other - its a case of having the circuit checked through as above to properly ID the cause of the fault on this.

Let me know if you need anything more at all-

>> >> >> > Meantime -- Please click on the OK rating to Excellent ratings service for me now, Thank you for that... and you can get back to me anytime if you need / wish..

Best Rgds, MIKE.


Please note, you are rating the content of my "answer" - my help to you - not the "system" which can experience delays etc which are not under my personal control -or delays caused by "time -off" which we all have on occasion - Thank you.

Customer: replied 3 years ago.

How do I "check the switch" and the wiper motor? It's not the relay I've replaced that.

Expert:  Mike replied 3 years ago.
Hello again Kevin..

Thank you for your reply... and my apologies that I could only just get back to you -

Do you have a test meter / test equipment ?

Rgds, MIKE..................................
Customer: replied 3 years ago.

no equipment as yet what do I need? Is the switch in the switch arm/indicator arm and how do I remove it from the steering column to check it or is it elsewhere?

Expert:  Mike replied 3 years ago.
Hello again Kevin..

You would need a test meter or at least a 12v test lamp / probe.

That is the switch you refer to yes - you have to remove the steering wheel if you need to replace the switch - if yours has an air bag , you must follow proper procedures for safety to remove that...

I will give you a general image to give you an idea as to how it comes apart - I dont have a lot on that age of vehicle, you may find it better to obtain a repair manual should you wish to do the whole job so that you can refer back to it continualy as you work..just a suggestion..

For the image, click below..

Once you are at the switch connections etc its a case then of testing the circuits to see what's happening.

If its not the switch at fault as above, then the control module will be the usual fault - if it should come to that , you will most likely need garage help with that -

When working on the above system / electrics , do be extremely careful - incorrect probing of wires can cause back -feed which can cause damage to control computers on this marque.

Here is the image I promised -

Attachments are only available to registered users.

Register Here

Attachments are only available to registered users.

Register Here

Attachments are only available to registered users.

Register Here
View Full Image

Attachments are only available to registered users.

Register Here


I hope that all helps you further..

Best Rgds, MIKE..

-- Please click on the OK rating to Excellent ratings service for me now, Thank you for that...

Rgds, MIKE.


Please note, you are rating the content of my "answer" - my help to you - not the "system" which can experience delays etc which are not under my personal control -or delays caused by "time -off" which we all have on occasion - Thank you.

What Customers are Saying:

 
 
 
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil
< Previous | Next >
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex
 
 
 

Meet The Experts:

 
 
 
  • Matt

    Matt

    Mechanical Engineer

    Satisfied Customers:

    481
    BEng hons Mech engineering, in auto industry 22 years
< Last | Next >
  • http://ww2.justanswer.com/uploads/35/350matt/2012-6-7_182356_matsavatr.64x64.jpg Matt's Avatar

    Matt

    Mechanical Engineer

    Satisfied Customers:

    481
    BEng hons Mech engineering, in auto industry 22 years
  • http://ww2.justanswer.com/uploads/EU/eurotec/2012-6-11_13153_mpjaphoto.64x64.JPG Marty's Avatar

    Marty

    ASE Certified Technician

    Satisfied Customers:

    21371
    Bosch Certified Master Technician with over 35 years experience in the automotive industry.
  • http://ww2.justanswer.com/uploads/MI/mikeamechanic/2013-4-2_175558_photo.64x64.JPG mike_a_mechanic's Avatar

    mike_a_mechanic

    Mercedes Mechanic

    Satisfied Customers:

    116
    17 years experience as a auto mechanic, foreign and domestic.5 years running my own repair business.
  • http://ww2.justanswer.com/uploads/MB/MBpaul/2013-8-21_204936_paul.64x64.jpg MB Paul's Avatar

    MB Paul

    Mercedes Technician

    Satisfied Customers:

    212
    Mercedes Benz Qualified Diagnostic Technician
  • http://ww2.justanswer.com/uploads/IN/indytech/2013-8-8_102717_SantoDomingo146598x6402.64x64.jpg Greg's Avatar

    Greg

    Technician

    Satisfied Customers:

    1080
    Automotive diagnostic tech
  • http://ww2.justanswer.com/uploads/TE/techmachine/0601821347169_717372168_8940977_39623330_o.64x64.jpg Ross's Avatar

    Ross

    Diagnostic and repair technician

    Satisfied Customers:

    453
    Licensed diagnostic and repair technician