dealer connected sds, found no communication from bas, esp control unit. need to replace. picked up exact same module off of ebay. connected up and started vehicle. abs light not illuminated and messages no longer showing. assisted steering working. backed the car out of the driveway, put it in drive and started to go forward and abs light came on and messages re-appeared. looks like this module is toast too. any ideas?

 

check rear speed sensor rings... most popular fault.
I thought new module needs initialized to car (VIN code)...

 

it was a used module...same part number.

 

Did you reset the sbc system? I believe when you change this parts you need to reset the counter with a star-das..

 

did not...i'll check into it

 

picked me up an icarsoft mb ii scanner. cleared codes, abs light out, drove 30 ft abs light back on. scanned for codes....left abs wheel sensor is not reporting data!

 

replaced abs wheel sensor...still no reading! then i discovered the issue with replacing wheel bearings which i did last year on the left side. bought parts from the local auto store. the wheel bearing seal is magnetized which drives the wheel sensor go figure. guess i'll stop at benz parts and pick me up a new one.

 

installed genuine mercedes wheel bearing seal.....still no reading from left front wheel! now what?

 

i cut the sensor off of my old abs harness. plugged it into the harness (engine side) on both left & right wheels with the other end attached to my volt meter. with the engine running i got the same voltages from both sides. doesn't appear i have a broken/shorted wire.

 

you are swimming up stream my friend. I can't give any insight because you have a used ESP/BAS module.

You need a wiring diagram and some back probes/test pins. Since you don't want to purchase a new part you need to back probe whatever pin on the ESP/BAS module connector is for whatever wheel speed sensor you aren't picking up..... if you aren't getting any readings out of that pin then the used control unit isn't transmitting data.

get a printout of the short test the dealership scanned with DAS/Xentry.....


my thoughts, buy a brand new module. Don't be buying used safety items like abs/esp/bas....

 

and have them install it.... pretty sure there's scn coding and vin specific criteria that needs to be entered. Don't quote me but if i recall that is the case....

 

You may have a different issue but I'll share my experience. Mines not the same year but several months ago I frequently had ABS, Sensor and a bunch of messages pop up on the screen. These would often go away if I stopped and restarted the car. I checked my ABS sensors, steering position sensor etc. etc. but to no avail. Finally I removed the big plug from the ABS module under the hood, cleaned all the pins (both sides male and female), reinstalled and that ended all issues; just my 02 cents.

 

Pinebaron, can you show me with pic what big plug and pins that you cleaned?

Mine has all ABS, EPS, BAS issues plus the red warnings, locked into park, brake lining wear, brake check, etc..
the first time I let it still for a couple of hours then turned it on and worked fine, now it happened again and I want to fix everything so it doesnt happen again. Already ordered the brake light switch just in case

 

I meant connector on the ABS module under the hood right up front passenger side similar to attached photo of ABS module and connector on the right.

 

You had to turn off the sbc pump to do that?? Ive been told that those components are high in pressure when active.

 

No need to turn off anything; you are simply removing the black connector on the right of the ABS module, cleaning terminals and reinstalling them. My car does not have an SBC pump.

 

got sticker shock on the control module at $1500 that's why i opted for the used part as a gamble. found it online for around $1000 so one of these days i'll order. will benz dealer install it if i bring my own part? years ago when i worked at a gas station i remember my boss telling customers who bought their own parts....do you take your steak to a restaurant to cook it! lol

 

yes for 5.5 hours of labor.

 

so i finally took the car in to the dealership. told me my left front abs sensor was bad. told them i replaced the sensor & bearing seal with mb parts. i asked what about the abs/bas control unit that appears to be dead. goes back to talk to the tech. tech replaces the abs sensor, resets codes, drives car and abs light is no longer illuminated. esp msg comes on. steering angle sensor code appears. tech installs my old abs sensor, resets codes and drives car. no abs light, esp msg appears. pulls codes....steering angle sensor. sas was replaced 6 months ago. tech doesn't believe sas is bad. thinks it may be the abs/bas control unit (no specific codes thrown) as this is the guy in the middle of all these new and prior symptoms. won't know until they install. once its installed its mine regardless if it works or not at a price of $2100.
they suggested i drive it for awhile and see if any new codes appear. right now i have 2 codes 6230 & 4D2E. any thoughts?

 

well what are the actual values in SCM? Any freeze frame data? I would be parts warrantying a new SAS before i shotgun a 2100 dollar esp module.


on another note, not sure if it applies to the 211 but there was a LI document for SAS/Clockspring wiring harness defects. You don't have a srs light on though and i think that is what the document refers too.

 

Just wondering if there have been any updates on this.

I have a 2005 E320 4matic wagon which has a brand new dealer installed SBC (last spring) and it's getting a rear left ABS sensor error. The sensor has been replaced with no improvement.

 

took my car back to dealer and they replaced the left front wheel speed sensor (after i installed genuine mb sensor & bearing seal) and the fault went away. they then put my original "new" sensor back on and fault stayed away.

 

Huh. That's strange. Maybe it needs the DAS system to reset this error?

 

Did you replace the seal? There's lots of threads about how the seals are also key to the sensor problem. If they're not put on right or if they're not MB ones, people get errors.

 

No, didn’t try that. I guess it’s time to place an order.

Any my chance you have a part #?