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C43 performance exhaust valve stopped working

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Old Sep 6, 2017 | 07:50 PM
  #1  
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C43 AMG
C43 performance exhaust valve stopped working

Has this happened to anyone else?
Waiting for the dealer to call me back to setup appointment.

2017 c43 amg with 2700km
I looked under the car and found the culprit. Wire melted on exhaust. Exhaust is permanently loud now lol



Last edited by imprezala; Sep 7, 2017 at 11:37 AM.
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Old Sep 6, 2017 | 08:19 PM
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Sounds to me like something that you wouldn't want to get fixed.
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Old Sep 6, 2017 | 08:29 PM
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2017 C43 AMG
Originally Posted by imprezala
Has this happened to anyone else?
Waiting for the dealer to call me back to setup appointment.

2017 c43 amg with 2700km
I looked under the car and found the culprit. Wire melted on exhaust. Exhaust is permanently loud now lol

https://www.flickr.com/gp/clementchew/yQ6W2r
That is weird. How could it be stuck open when the car didn't even go through winter yet? Please keep us posted.
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Old Sep 7, 2017 | 10:26 AM
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id get that fixed. that sucks. i love it loud, but its nice to quiet it up for long trips.
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Old Sep 7, 2017 | 11:38 AM
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Originally Posted by AMG_FVR
That is weird. How could it be stuck open when the car didn't even go through winter yet? Please keep us posted.
its stuck I think because the wire got melted bad.. maybe shorted?

yeah i like it loud but not on the hwy.. it droned
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Old Sep 7, 2017 | 12:55 PM
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Are you getting a dash light or warnings? If not, I might just go cut all the exhaust flap wires 😂
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Old Sep 7, 2017 | 12:59 PM
  #7  
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Originally Posted by skim7x
Are you getting a dash light or warnings? If not, I might just go cut all the exhaust flap wires 😂
no warnings! you dont need to cut the wire you can easily unplug the connector
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Old Sep 7, 2017 | 01:12 PM
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Originally Posted by imprezala
no warnings! you dont need to cut the wire you can easily unplug the connector
i was just gunna say, you could unplug it lol. thats great. so the individual mode turning exhaust on has a patch fix lol. only negative youll get it all the time.
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Old Sep 17, 2017 | 10:47 AM
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Got my car back yesterday, cable shorted and blew thew fuse. They replaced the fuse and repaired the cable it is all good now.

they have never seen this happen before
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Old Sep 17, 2017 | 01:02 PM
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So open the exhaust valve then pull the fuse.. should stay open forever.. that's my next mod !!
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Old Sep 17, 2017 | 01:12 PM
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CLS
I thought the polar bear mod was next.
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Old Sep 18, 2017 | 09:54 AM
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Originally Posted by imprezala
Got my car back yesterday, cable shorted and blew thew fuse. They replaced the fuse and repaired the cable it is all good now.

they have never seen this happen before

Hey Imprezala, I have the same problem. Can you tell me which fuse blew? And where it is located?

I have the same problem, but it originated from a rear end accident. The body shop put it back together, but the car is getting an error code saying exhaust flap 2 shorted to ground. They said, they might have fixed the short, but the flaps are still open and not closing. So it might be the fuse.

Would really appreciate it.
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Old Feb 6, 2024 | 01:56 PM
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2013 MB S212, 1991 Mits E39A
I just had this same thing happen on my 2018 C43 when i took it to the track 2 days ago. I don't know how long that wire has been touching the exhaust, but i think pushing the car finally got the exhaust hot enough to melt the wire. It melted through the insulation, shorted the red wire to the exhaust, and blew a 7.5A fuse which is NOT located in ANY fuse box. It's actually under the passenger side carpet, just below the speaker that is installed in the firewall.

I had to remove the following: Passenger side rocker panel/fusebox cover. Outer dash cap. Under dash kick panel. Glove box. Then, pull back the carpet and remove the cover underneath which is retained by 3 6mm (10mm socket) nuts. Remove nut holding a module that covers the mount point for the fuse holder. Push out the fuse holder.

Having never torn into one of these, i was surprised at how much stuff is under the passenger side carpet. It took me about 2 hours to tear it all apart, replace the fuse and put it back together.

This really ruined my track day, as it did and WILL put the car into soft limp mode, as any fault in the exhaust system would be considered "emissions related".
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Old Feb 7, 2024 | 10:00 AM
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I was actually about to put everything back together, when i realized a video may help somebody immensely if this happens.
The diagram i found that illustrates where the fuse is located is about as clear as mud. Hope this can help somebody, because while i was looking for info about the issue, i stumbled across this thread myself.

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