Rear Strut - Lower end ball joint - Mercedes-Benz Forum
 
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post #1 of 3 (permalink) Old 06-20-2019, 06:52 PM Thread Starter
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Rear Strut - Lower end ball joint

Hi Guys,

Want to know and understand why the lower ball end joint of the w163 rear struts have this ball end joint built into the lower shock end.
I noticed on one of the w163 rear strut shocks, the ball joint rubber boot cover had a small tear on it and looked inside. I could see the ball end and obviously, these things are supposed to be permanently sealed to maintain, I guess, a closed environment for lubrication to the joint.

My curiosity got the better of me.

I noticed it resembles a lower suspension arm ball joint.

Please enlighten me.

Cheers.
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post #2 of 3 (permalink) Old 06-21-2019, 01:49 AM
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It needs to move with the lower control arm and would be much more reliable and better wearing than a rubber bush either side like most shocks.


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post #3 of 3 (permalink) Old 06-21-2019, 08:18 AM Thread Starter
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Originally Posted by mattml430 View Post
It needs to move with the lower control arm and would be much more reliable and better wearing than a rubber bush either side like most shocks.


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Thanks matt.

Interesting.
I was viewing this in relation to the simple rear coilover setups that sgtpepperaut and pte performed on their MLs in lieu of the oem strut setup.

I've seen a few of the boots on these oem struts that have torn open and exposed the ball joint inside. Seems t me another potential issue to deal with if the strut has to be replaced (prematurely) due to ball joint failure?
I havent read about or seen one personally.

I did notice a these joints can get still even when the boot fully intact. Only noticed this with the strut assembly removed. Cant really tell (other than seeing a torn/damaged boot upon closer inspection) with them in place.
Perhaps the sealed lubricant inside has dried out?
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