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 Stan Your Own Question

Stan
Stan, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3338
Experience:  Technical support engineer
16766657
Type Your Mercedes Question Here...
Stan is online now
A new question is answered every 9 seconds

Multi function relay? (1997 Mercedes Benz C280 - Kaehler Relay)

Resolved Question:

where is the multi function relay? (1997 Mercedes Benz C280 - Kaehler Relay)
Submitted: 5 years ago.
Category: Mercedes
Expert:  Stan replied 5 years ago.

HelloCustomer

 

Please look at the picture below. This is K40 relay module.

Best Regards,

Stan.

graphic

Expert:  Stan replied 5 years ago.

Just to make sure we are on the same page here because there are two relay modules, could you describe which functions are controlled by the relay you are asking about?

Does your car have a mechanical or electronic ignition key?

Customer: replied 5 years ago.
This is the relay for the wipers and the turn signals. At times the wiper comes on when it wants to. The turn signals work sometime and sometimes they do not. It appears that these items are covered by the multi function relay. Unfortunately the diagram that I once used does not indicate clearly where it is. It appears it may even be in the trunk.
Expert:  Stan replied 5 years ago.

Thank you for clarifying. To access it, you will need to remove the front left fusebox cover. Below is the picture of it. 97 was a model change year, let me know if you see a bit different picture. But the location of combination relay was unchanged. Quite often the problem described is caused by cold solder joints on the electrical plates of the relay, so a good soldering job might solve the issue.

Best Regards,

Stan

graphic

Customer: replied 5 years ago.
I am sorry for the delay. I will try to look for it today.
Customer: replied 5 years ago.

Again, sorry for the delay. I have taken a look at it. I am guessing it is the one that looks lilke the one in the picture. It does not have N10 on it. There are 3 other relays in there. 2 are smaller and square and the other one is held in place by a bracket kind of thing.

I do not see any problems with the posts on the relay.

 

Would a faulty relay be the likely cause if the wiper turned on by itself and the turn signals worked every now and then. By the way the wiper will sometimes come on when I start the car. By turning the car off it will then turn the wiper off. Restarting the car seems to fix the problem for that period of driving. At other times I have been driving and all of the sudden the wiper just starts, well, wiping. Again, turning the car off and restarting makes it stop.

Thank you.

 

Michael

Expert:  Stan replied 5 years ago.

Hello Michael,

The two things these systens have in common are the combination switch and this relay. So it should be the relay's fault if the switch has no effect on the problems. It will not have N10 written on it. If in doubt, remove the relay and then switch on turn signals and wipers, they will not function with the relay out.

If you have friend who deals with electronics, tell him that you mostl likely have a cold solder issue in the multi-functin relay, and he will know what he needs to resolder. The relay must be taken apart for this, you will not see any damage unless it is disassambled.

 

Best Regards,

Stan

Stan, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3338
Experience: Technical support engineer
Stan and 7 other Mercedes Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • 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 Elm City, NC
< Last | Next >
  • 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 Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • 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 Walnut Creek, CA
  • 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 Charleston, WV
  • 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 Castleberry, FL
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
 
 
 

Meet The Experts:

 
 
 
  • MB Paul

    Mercedes Technician

    Satisfied Customers:

    3450
    Qualified Mercedes Benz Diagnostic Technician - 20+ years experience - Workshop Foreman for Mercedes
< Last | Next >
  • http://ww2.justanswer.com/uploads/MB/MBpaul/2013-8-21_204936_paul.64x64.jpg MB Paul's Avatar

    MB Paul

    Mercedes Technician

    Satisfied Customers:

    3450
    Qualified Mercedes Benz Diagnostic Technician - 20+ years experience - Workshop Foreman for Mercedes
  • http://ww2.justanswer.com/uploads/EU/eurotec/2012-6-11_13153_mpjaphoto.64x64.JPG Marty's Avatar

    Marty

    Mercedes Technician

    Satisfied Customers:

    22931
    Bosch Certified Master Tech. Over 35 years experience.
  • http://ww2.justanswer.com/uploads/RA/Racer76916/2012-5-8_6855_justanswerprofile.64x64.jpg Michael Warfield's Avatar

    Michael Warfield

    Factory Mercedes-Benz Technician

    Satisfied Customers:

    2807
    Mercedes-Benz Master Certified technician
  • http://ww2.justanswer.com/uploads/PE/peterpete190/2012-2-24_1274_20120215135406.64x64.jpg Pete's Avatar

    Pete

    Mercedes Mechanic

    Satisfied Customers:

    2556
    Over 15 years experience as a Mercedes dealer technician
  • http://ww2.justanswer.com/uploads/CA/caprio23/2011-12-13_155550_20111213105344.64x64.jpg Anthony's Avatar

    Anthony

    Mercedes Technician

    Satisfied Customers:

    642
    MB Tech. since 1997. ASE Master. MB Factory Technician. MB Antique Specialist.
  • http://ww2.justanswer.com/uploads/promerc/2009-01-04_220431_ja_pic.jpg promerc's Avatar

    promerc

    mercedes diagnostic technician

    Satisfied Customers:

    487
    Qualified mercedes diagnostic technician & service team manager , ATA registered Master tech
  • http://ww2.justanswer.com/uploads/73bbchevy/2009-12-8_232724_Picture_006.jpg Lou P. master tech's Avatar

    Lou P. master tech

    Mercedes Technician

    Satisfied Customers:

    418
    10 years master certified 100% fix rate knows mercedes like the back of my hand!!!!!
 
 
 
Chat Now With A Mercedes Mechanic
Stan
Stan
Mercedes Mechanic
3338 Satisfied Customers
Technical support engineer