Error code b23ac, electric parking break malfunction
Thread Starter
Newbie
Joined: Sep 2020
Posts: 4
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C43 AMG
Error code b23ac, electric parking break malfunction
Hi,
I have a problem with my c43 amg. The yellow light for the parking break in the cluster is on all the time and every time I start the car a warning message for the parking break comes on. I have checked the car for error codes, and the one that I’ve found is b23ac, electric parking break button malfunction. I’ve switched the button to a new one, but the problem remains.
The parking break works otherwise. When I turn the car off it automatically engages and when I turn it on and put it in reverse or drive it automatically disengages. But I can’t engage or disengage it with the button.
Has anyone here had the same problem? Or knows what might cause this?
Would really appreciate the help. Thanks.
//Jesper
I have a problem with my c43 amg. The yellow light for the parking break in the cluster is on all the time and every time I start the car a warning message for the parking break comes on. I have checked the car for error codes, and the one that I’ve found is b23ac, electric parking break button malfunction. I’ve switched the button to a new one, but the problem remains.
The parking break works otherwise. When I turn the car off it automatically engages and when I turn it on and put it in reverse or drive it automatically disengages. But I can’t engage or disengage it with the button.
Has anyone here had the same problem? Or knows what might cause this?
Would really appreciate the help. Thanks.
//Jesper
Super Member
Joined: Dec 2016
Posts: 797
Likes: 141
2018 C43
Hi,
I have a problem with my c43 amg. The yellow light for the parking break in the cluster is on all the time and every time I start the car a warning message for the parking break comes on. I have checked the car for error codes, and the one that I’ve found is b23ac, electric parking break button malfunction. I’ve switched the button to a new one, but the problem remains.
The parking break works otherwise. When I turn the car off it automatically engages and when I turn it on and put it in reverse or drive it automatically disengages. But I can’t engage or disengage it with the button.
Has anyone here had the same problem? Or knows what might cause this?
Would really appreciate the help. Thanks.
//Jesper
I have a problem with my c43 amg. The yellow light for the parking break in the cluster is on all the time and every time I start the car a warning message for the parking break comes on. I have checked the car for error codes, and the one that I’ve found is b23ac, electric parking break button malfunction. I’ve switched the button to a new one, but the problem remains.
The parking break works otherwise. When I turn the car off it automatically engages and when I turn it on and put it in reverse or drive it automatically disengages. But I can’t engage or disengage it with the button.
Has anyone here had the same problem? Or knows what might cause this?
Would really appreciate the help. Thanks.
//Jesper
Thread Starter
Newbie
Joined: Sep 2020
Posts: 4
Likes: 0
C43 AMG
When I checked it with autocom it says:
-parking break button faulty
-signal fault
-permanent
Newbie
Joined: Mar 2024
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2016 C300
Hey, I have the same problem in my 2016 c300 did you find out what the problem was?
Thread Starter
Newbie
Joined: Sep 2020
Posts: 4
Likes: 0
C43 AMG
Hi, yes after a lot of troubleshooting. It was a ground cable in the harness that goes in to the abs module that was faulty. Mercedes told me that the whole module was faulty and needed to be replaced and programmed with new software to fit the vehicle. Total cost for this was about 3500 usd. But as I said, it was only the ground cable in my case.
