oldstar

I have been having the ABS/ ESP/ Tire pressure warning Message coming up on my dash for the last week.
I have an MB2 Scanner ( worth the $200 I paid for it ) that told me the problem was the right rear speed
of Wheel Axel was off. I had just replaced the Wheel Sensor 3 Months ago and was thinking it might be, I had gotten a Bad Sensor.
It turned out to be the tone ring. Lots of stuff on the web about replacing axels @ big $$$$ and im not saying that might not be the problem for other people.
If you need to replace the Tone Ring the part number from MB is - 230-357-01-82 The picture above is of the Ring that came off my 2007 S550 / 4Matic.
I hope the above helps out if you have a problem like mine.
BTW: The Ring was $22.00 Canadian Dollars.

Nuru

Hmm, I recently got a error like this where the NAV and the rear sensor had a delta between them. The alarm was cleared but did not come back.

oldstar

Just an update:
I have been away with the car and have put 1300 kms on from having the tone ring replaced.
Im happy to report everything is still fine. I Also find the Tone Ring goes by the Name "Reluctor Wheel" just in case you see it listed on the internet with that term being used.
ABS / ESP / TIRE All fine and no Warning Messages in the Dash.

yeziam

Looking at diagrams it appears the axle needs to come out to replace. Am I following this correctly? Cheap part, but expensive fix?

oldstar

The Axle does come out of the car.
Total time was 4.5 Hours,
Tone Ring goes on easy.

Euroed

I had my 2007 S550 4Matic in to my local mechanic to have the reluctor ring replaced. He believed he had to remove the reverse torque nuts. None of his tools fit. Do you know if it is a special socket or such, or do you not need to remove the torque nuts? Thanks very much Ed

oldstar

I am not sure about your Torque nut question. may understanding is, all you have to do is roll the knuckle out of the way so you have room to work.
This set up is a lot like the Chrysler 300's

EasyPhil

Your mechanic is going to have to buy the correct size eTorx socket.

Euroed

Thank you for getting back to me. I was wondering if you need to remove the torque nuts or does the whole assembly pull off? The issue he had was that all the torque sockets he had were to deep too fit in the small space with the ratchet. I was not there so I do not know what he removed, but he is pretty good and would have tried a couple things before giving up. He could get on the torque nut, but he was on such and angle he was afraid of rounding them. The picture here shows the pulling off of the hub, but I do not see anything about removing the torque nuts first.
[img=left]https://cimg7.ibsrv.net/gimg/www.mbworld.org-vbulletin/960x720/5_f41e4102b0a6de62f39b7557e20278f5c21280d8.jpg[/img]

Euroed

Thanks for the reply. He had two or three that were the correct size for the nut but he could not fit them in the tight area. Ed