ABS/ESP Problem 2008 S500
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S211 3.2 R6, W221 S500
ABS/ESP Problem 2008 S500
Hello, I have a problem, suddenly while driving on the road the cruise control stopped working and the ABS light came on.
VIN: WDD2210861A239460
In the "abr" module the computer showed error 5134 L6/4 sensor right rear.
The sensor was replaced and the fault codes were cleared. After starting the car, the ABS error message still appears on the instrument cluster, but after a while, when the car starts moving, it goes off and then comes back on after driving about 50-100 meters.
In live parameters all 4 wheels show the speed from the sensors correctly.
Current errors that appear in modules are:
In the "abr" module the computer showed error 5134 L6/4 sensor right rear.
„tcm” D40C No CAN message was received from control unit N47-5(ESP and BAS contro/ module)(171/203/209)or from control unit N47-5(ESP control unit)(164/219/251/216/221) or from control unit N47-5(ESP, SPS [PML] and BAS contro unit) (211/215/220/230)or from control unit Brake system„ism” 1953 Incorrect signal or signal transmission disruption from control module "N30/4 (ESP control module)"
„ecm” 1425 wheel speed signal is invalid.
„sgr”
7409 Chassis CAN bus: No CAN message was received from control unit N47-5(ESP control unit.
7403 Chassis CAN bus: The CAN signals sent from control unit N47-5(ESP control unit) are implausible. (Wheel speed)
”epb” 584f The CAN signal Wheel speed of the N47-5 control module (EPS control module) is incorrect.
Where to look for the cause since the right rear sensor was replaced and the problem remained.
Thank you all in advance for your help.
VIN: WDD2210861A239460
In the "abr" module the computer showed error 5134 L6/4 sensor right rear.
The sensor was replaced and the fault codes were cleared. After starting the car, the ABS error message still appears on the instrument cluster, but after a while, when the car starts moving, it goes off and then comes back on after driving about 50-100 meters.
In live parameters all 4 wheels show the speed from the sensors correctly.
Current errors that appear in modules are:
In the "abr" module the computer showed error 5134 L6/4 sensor right rear.
„tcm” D40C No CAN message was received from control unit N47-5(ESP and BAS contro/ module)(171/203/209)or from control unit N47-5(ESP control unit)(164/219/251/216/221) or from control unit N47-5(ESP, SPS [PML] and BAS contro unit) (211/215/220/230)or from control unit Brake system„ism” 1953 Incorrect signal or signal transmission disruption from control module "N30/4 (ESP control module)"
„ecm” 1425 wheel speed signal is invalid.
„sgr”
7409 Chassis CAN bus: No CAN message was received from control unit N47-5(ESP control unit.
7403 Chassis CAN bus: The CAN signals sent from control unit N47-5(ESP control unit) are implausible. (Wheel speed)
”epb” 584f The CAN signal Wheel speed of the N47-5 control module (EPS control module) is incorrect.
Where to look for the cause since the right rear sensor was replaced and the problem remained.
Thank you all in advance for your help.
Last edited by zstx; Jul 25, 2025 at 05:08 AM.
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S211 3.2 R6, W221 S500
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S500
the error should go away if the correct part is functioning correctly and or fitted correctly - maybe there is a wire fault the other side of the connector plug - why you get a "good reading" I don't know
something is clearly amiss you need to resolve...
something is clearly amiss you need to resolve...
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S211 3.2 R6, W221 S500
I know something is wrong, that's why I added the post. With the cables and plug everything looked ok, but whether it was an old sensor or a new one didn't make any difference.
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S211 3.2 R6, W221 S500
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somehow something else is going on - the behaviour you describe is not normal
I'd start with battery off for 20 mins and then clear all faults and try again - it shouldn’t help but the CGW is the main comms element of all diagnostics and maybe its having a moment - free at least
what Kit are you using - some are a bit odd on trying to communicate with all parts of a merc
if its won't go away I guess the ABS module is playing up quite normal on most brands - but its an odd one for sure
I'd start with battery off for 20 mins and then clear all faults and try again - it shouldn’t help but the CGW is the main comms element of all diagnostics and maybe its having a moment - free at least
what Kit are you using - some are a bit odd on trying to communicate with all parts of a merc
if its won't go away I guess the ABS module is playing up quite normal on most brands - but its an odd one for sure
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S211 3.2 R6, W221 S500
somehow something else is going on - the behaviour you describe is not normal
I'd start with battery off for 20 mins and then clear all faults and try again - it shouldn’t help but the CGW is the main comms element of all diagnostics and maybe its having a moment - free at least
what Kit are you using - some are a bit odd on trying to communicate with all parts of a merc
if its won't go away I guess the ABS module is playing up quite normal on most brands - but its an odd one for sure
I'd start with battery off for 20 mins and then clear all faults and try again - it shouldn’t help but the CGW is the main comms element of all diagnostics and maybe its having a moment - free at least
what Kit are you using - some are a bit odd on trying to communicate with all parts of a merc
if its won't go away I guess the ABS module is playing up quite normal on most brands - but its an odd one for sure
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S211 3.2 R6, W221 S500
So I understand that I should disconnect both batteries, front and rear, wait some time, then delete all errors with the computer and check if everything is OK?
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'91 964 Turbo, '02 E55's & '14 E63s-w
Just did mine on a 2002 E55 after the battery change
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S211 3.2 R6, W221 S500
Can you describe it to me in more detail how to do it in a 2008 W221? Because I have two batteries, one in the front and one in the back.
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S211 3.2 R6, W221 S500
I still don't quite understand what to do. I disconnected both the front and rear batteries. I'll wait 15-20 minutes and reconnect them. I'll clear the fault codes and see if the ABS is working properly. From what I understand, the guy above said to do that.
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S211 3.2 R6, W221 S500
Disconnecting both the front and rear batteries, waiting 20 minutes, reconnecting them, and clearing the errors with the computer unfortunately didn't change anything. Immediately after starting the car, the ABS light comes on. After driving a short distance, it disappears for a moment, then reappears and remains on continuously. The sensors show the speed correctly in the live parameters.
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This is indeed very strange and I would have to say the new speed sensor you installed is not functioning correctly despite the proper speed reading. If it was me, I would purchase a new sensor and swap it for the "strange" one. Then report results back here. Good luck.
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S211 3.2 R6, W221 S500
And you know what's weirdest? This error suddenly appeared while driving on the highway with cruise control on. After connecting the computer, it showed the right rear sensor, which was replaced, and all four sensors show speed in the live parameters. But before the replacement, the old sensor that was replaced also showed speed in the live parameters. And why are there so many errors in other CAN-related modules? Maybe there's a cause somewhere?
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Since the sensor was replaced and live data shows correct speeds, the issue isn’t the sensor itself. The ABS module (N47-5) or its wiring/connectors are likely faulty common on these cars. Check for corrosion, damaged pins, or water intrusion in the ABS unit or wheel speed sensor wiring. If all looks clean, the ABS module itself may need repair/replacement. The CAN bus errors point to communication failure, not just a sensor problem.
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S211 3.2 R6, W221 S500
Since the sensor was replaced and live data shows correct speeds, the issue isn’t the sensor itself. The ABS module (N47-5) or its wiring/connectors are likely faulty common on these cars. Check for corrosion, damaged pins, or water intrusion in the ABS unit or wheel speed sensor wiring. If all looks clean, the ABS module itself may need repair/replacement. The CAN bus errors point to communication failure, not just a sensor problem.
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S500
if its the early car with twin batteries the CGW reset is achieved only disconnecting the rear - in spare wheel well right hand side is a flat ribbon cable earth with a Red 13mm headed bolt - undo this for 20 mins - window and sunroof anti trap will be usually be required afterwards
the post just above about steering angle / road test muddle up - doesn't explain the wheel speed sensor failure remaining in diagnostics - the road text muddle up - is something you can try - a secret menu got at via steering wheel menus - to get a diagnostic and volt reading on the cluster might be worth a play we have had a few state magic happens if you go in road test mode - I think it somehow reboots the ant brain in the ESP model and it wakes up less stupid (I forgot that one) - getting out of it is weird, but you'll get there
of course the ABS module might be dead - but the usual one there is no comms with an ABS module (as its playing up)
Last edited by BOTUS; Jul 27, 2025 at 07:08 AM.
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2006 S350L
This exact problem afflicts me as of 3 days ago.
Thank you OP & Botus for this post and the feedback you've exchanged here. I will follow up tomorrow with more details.
@zstx is your issue solved or are both in the same boat?
your symptoms as described are *exactly* same as mine, with the only difference that in my case it was front/right ABS sensor. Both were replaced (front left / front right) and your same situation persists.
Thank you OP & Botus for this post and the feedback you've exchanged here. I will follow up tomorrow with more details.
@zstx is your issue solved or are both in the same boat?
your symptoms as described are *exactly* same as mine, with the only difference that in my case it was front/right ABS sensor. Both were replaced (front left / front right) and your same situation persists.
Thread Starter
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S211 3.2 R6, W221 S500
This exact problem afflicts me as of 3 days ago.
Thank you OP & Botus for this post and the feedback you've exchanged here. I will follow up tomorrow with more details.
@zstx is your issue solved or are both in the same boat?
your symptoms as described are *exactly* same as mine, with the only difference that in my case it was front/right ABS sensor. Both were replaced (front left / front right) and your same situation persists.
Thank you OP & Botus for this post and the feedback you've exchanged here. I will follow up tomorrow with more details.
@zstx is your issue solved or are both in the same boat?
your symptoms as described are *exactly* same as mine, with the only difference that in my case it was front/right ABS sensor. Both were replaced (front left / front right) and your same situation persists.
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2006 S350L
I will spend a significant amount of effort on this tomorrow (in 9 hours from now)
In the "old world" of BMW 7er this would have been one of 3 things:
a) ABS sensor
b) magnetic ring in the wheel hub (went through this 3 times)
c) ABS control unit
In this "new world" of W221 I'm not sure what type of nightmare I will discover. I assure you that we will find this, and beat it.
We are going to turn that ABS light *off* in short order!
