W222 2014 s class Horn issue
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W222
W222 2014 s class Horn issue
I own an S Slass W222 2014 Long wheelbase model.
Recently while driving the horn started going by itself without any reason, this went on for about 2-3 minutes and then horn stopped working.
Since then I have replaced the Horn relay and also checked the Horn fanfare fuse, they are both fine.
Also the horns do work when i lock the car which is very strange
The horn still doesn't work, I would prefer to diagnose and fix this issue myself, Does anyone know where are the actual horns are and how should I replace them?
Any advice would be highly appreciated
Thank you
Alan
Recently while driving the horn started going by itself without any reason, this went on for about 2-3 minutes and then horn stopped working.
Since then I have replaced the Horn relay and also checked the Horn fanfare fuse, they are both fine.
Also the horns do work when i lock the car which is very strange
The horn still doesn't work, I would prefer to diagnose and fix this issue myself, Does anyone know where are the actual horns are and how should I replace them?
Any advice would be highly appreciated
Thank you
Alan
Last edited by Illusionist; Nov 19, 2018 at 08:39 AM. Reason: rememembered new information
MBWorld God!
Joined: Jul 2010
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From: on my way
2012 CLS63
Kongnister where are you?? He's the guy with ALL the info on MB's you'll ever need. Haven't seen him around as of late. Is your car CPO or extended warranty? I had that happen on a Porsche once! You got lucky when it went off in three minutes! Mine was blowing ALL the way to the dealer LOL!
good luck.
good luck.
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W222
it looks like it might be the steering wheel contacts causing this issue as the horn still works when i lock the car, anyone knows how should i go about opening and investigating the steering wheel? there is no guidance anywhere on the internet, Dealer said £168 just to investigate the failure, i would prefer not to go down the dealership path if i can help it, dont know how to contact konigstiger
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W222
Does anyone actually know how should i open the steering wheel, take the airbag out? there are no pin holes at the back, do I need to make holes by pressing into the space available? i would rather not make holes if i can help it, any help is highly appreciated
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W222
a quick progress update
after disconnecting the battery I took the airbag out of the steering wheel and found nothing wrong, All cables are connected just fine, no issue with the electronic board either, i am really confused what to do next, any advice from anyone would be appreciated
after disconnecting the battery I took the airbag out of the steering wheel and found nothing wrong, All cables are connected just fine, no issue with the electronic board either, i am really confused what to do next, any advice from anyone would be appreciated
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W222
Problem resolved
Please see below steps I took to resolve the issue
i refuse to take it to Mercedes for them to charge me £170 just to check this tiny issue
1. I disconnected the battery which is in the boot and very simple to do after which you must wait 30 minutes to stop airbag blowing on your face.
2. I took the airbag out of the steering wheel which is very simple by pushing inside the holes with screw driver behind the steering wheel, remember you have to break the leather seal to do this.
3. Open 3 holes and take the horn plate out
4. Disconnect all of the cables from the plate which you can see in the attached picture.
5. I quickly discovered that one of the connector marked red had a tiny hole inside, after checking with multi meter I could see it was not conducting electricity.
6. Using hot soldering iron I just dropped a tiny amount of solder which resolved the issue
put everything back in the same order and your issue is fixed
Last edited by Illusionist; Dec 1, 2018 at 10:40 AM. Reason: Pictures were missing
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Joined: Apr 2016
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2014 S550 AMG, 2017 XT5
Please see below steps I took to resolve the issue
i refuse to take it to Mercedes for them to charge me £170 just to check this tiny issue
1. I disconnected the battery which is in the boot and very simple to do after which you must wait 30 minutes to stop airbag blowing on your face.
2. I took the airbag out of the steering wheel which is very simple by pushing inside the holes with screw driver behind the steering wheel, remember you have to break the leather seal to do this.
3. Open 3 holes and take the horn plate out
4. Disconnect all of the cables from the plate which you can see in the attached picture.
5. I quickly discovered that one of the connector marked red had a tiny hole inside, after checking with multi meter I could see it was not conducting electricity.
6. Using hot soldering iron I just dropped a tiny amount of solder which resolved the issue
put everything back in the same order and your issue is fixed
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