2012 S204 C220 CDI - ABS, ESP, Run Flat Fault.

[Aaron Mock]

Hi,

I'm really hoping someone can help with an issue I'm having with my car. I have done some research on here and have found that the issue seems quite common but the resolution can differ.

My car intermittently flashing up with loss of ABS, ESP and an inoperable run flat sensor. Now from what I've read this is often diagnosed as a faulty ABS sensor, I had a family mechanic friend check for fault codes on STAR diagnostic and this read that the sensors were implausible. I contacted Mercedes and sourced two new ABS sensors and fit them. All was perfect, some time passed but this issue started again.

I have today checked for fault codes again and the following was produced

C111100 - Implausible rpm sensor (right front axle)

C110200 - Implausible rpm sensor (left front axle)

I'm really not that privy to the braking system so any advice on what part to change next would be massively appreciated. I'm happy to have a go at most things mechanical I just can't seem to diagnose what to do next.

Thanks in advance.

Aaron

 

[mattkh]

When you fitted the sensors, did you see the reluctor rings on any of the sides. If yes, what did you see on which axle/side.?

 

[Aaron Mock]

When you fitted the sensors, did you see the reluctor rings on any of the sides. If yes, what did you see on which axle/side.?

Hi, thanks for the response. I didn't check them but could take the wheels off and have a look. Also looking through the diagnostic report one wheels seems to think its moving and the other is stationary. Maybe the ring on the one that thinks its moving is causing the problem?

 

[mattkh]

Thanks.
Only take the wheels off if you must. On my A class, I could see the ring without this. I just cleaned the ring with some soap to cure the fault.