Flex disc

[radlark]

I hear talk about checking this piece, to trying to narrow down the cause of this vibration problem that I am having. Where is this located and how can I tell if it is bad?

[downsmith]

It is sort of Mercedes' answer to U-joints. Look on either end of the driveshaft and you can tell if the material is degraded or missing.

[RKreutzer]

This is how it looks...

[MTI]

Imagine, he had to flip the car over to take that pic!

[xp190]

What is that line coming out of the differential? I have one too but it's cut and just hangs there like that, do I need this for something? I thought of it to be a breather hose of some sort but it's dry so I don't think so anymore.

xp

[mhingram]

xp,
the Line is a sensor for speed pickup or rpm pickup can not remeber exactly.
m

It is the rear wheels ABS sensor.
JackD

[william rogers]

sho nuff wished my flex disk looked that good.............
William Rogers.......

[RKreutzer]

I'm glad you like my flex disc ... upside down...

Reinhard Kreutzer

[mhingram]

thanks jack you are right on the part number is 126 540 32 17 it is the abs speed sensor.
m

[xp190]

that's funny, my car has no ABS, I guess the differential was swapped once already, it sounds now as if it needs to be swapped again....

xp

[radlark]

Thanks alot guys I actually haad to replace mine and the grinding noise went away! I want to say that this is a great site to acquire info from and evrybody is very helpful, thank you very much!

[xp190]

I have a grinding noise but I just replaced the felx discs.... very frustrating....

xp

[daddiojiggy]

i would have thought the speed sensor would be at the corners ,not at the diff?

[pentoman]

Most generations of ABS up until recently only, in fact, have one sensor for both rear wheels, usually located in the differential. This means that, if one rear wheel locks, the brakes will be release on both wheels. I'm not entirely sure why this is, perhaps because of the differential effect?

Russ