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E-Class (W212) 2010 - 2016: E 350, E 550

w212 sway bar link

 
Old 10-31-2016, 11:12 PM
  #1  
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2010 e550 p2
w212 sway bar link

About a week ago my car(10 e550) started pulling to the left on freeway (sometimes not only)
so i thought it might be either an alignment (even though i didnt hit any big potholes or anything) or due to uneven tire wear (since its lowered on links without camber bolts) , so i decided to switch my front tires around and see if it would pull to the right or if it would pull to any side , so i lifted the car and before taking off the wheels smth hit me and i decided to check suspension components , and damn right didnt even have to look hard , within first 5 sec ive noticed one of the rubbers/bushings is in some sorta oil , so took a closer look and it turns out to be a sway bar linkage...
now my questions are
1. what the OEM part number for it?(yes yes , i realized i shoulda looked for it when i took out the jack) is it this >> 2123201189
2. should i change 2 of them at this point? or just wait until another one goes bad and replace it then?
and 3. alignment needed after ? (im thinking not , but want to see wat u guys think)
any input is appreciated.
gonna be an oil change and DIY on linakage this saturday.
thanks
Attached Thumbnails w212 sway bar link-20161031_183857.jpg   w212 sway bar link-20161031_184143.jpg   w212 sway bar link-20161031_184133.jpg   w212 sway bar link-20161031_183823.jpg   w212 sway bar link-20161031_183744.jpg  

w212 sway bar link-20161031_183653.jpg  
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Old 11-01-2016, 05:20 AM
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I did my fronts at about 90K, for me there was a clunking noise at low speeds when one wheel would go over a bump and not the other. Even though only the right was broken, the garage suggested changing both.

It was about $300 all in, and I did not do an alignment afterwards.
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Old 11-01-2016, 09:26 AM
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2010 e550 p2
Originally Posted by mikemargolis View Post
I did my fronts at about 90K, for me there was a clunking noise at low speeds when one wheel would go over a bump and not the other. Even though only the right was broken, the garage suggested changing both.

It was about $300 all in, and I did not do an alignment afterwards.
im at 93k miles also
yea read online that its better to get both of them changed , so gonna order some in a few hours.
you went with OEM ones?
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Old 11-01-2016, 10:10 AM
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Originally Posted by belarus27 View Post
you went with OEM ones?
Yes I did
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Old 11-05-2016, 02:28 AM
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2010 e550 p2
Got a chance to replace sway links
Left part # 2123201189
And right is 2123201289
Looks like these are a newer Rev.
Old ones said thk 11-2 and new ones are 12-1.
Attached Thumbnails w212 sway bar link-20161104_181604.jpg   w212 sway bar link-20161104_181516.jpg   w212 sway bar link-snapchat-1796911067.jpg  
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Old 11-06-2016, 12:08 AM
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Did the old ball joint seem more loose than the new one?
IMO it's unlikely that the endlink would lead to pulling to the side on the freeway.

Is there any control arm directly above where the endlink was covered in oil?
The control arm bushings are typically filled with black silicone fluid and they crack and leak with old age.
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Old 11-06-2016, 01:29 AM
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Originally Posted by VVF View Post
Did the old ball joint seem more loose than the new one?
IMO it's unlikely that the endlink would lead to pulling to the side on the freeway.

Is there any control arm directly above where the endlink was covered in oil?
The control arm bushings are typically filled with black silicone fluid and they crack and leak with old age.
yea it felt like it wasnt as firm as the new one

and on my way TO work and FROM work the car did drive straight , it went almost a mile straight by itself , but there was some clunking noise , so i figured i didnt tighten its good enough so after work had to fix that today.
will see hows the ride tomorrow morning on the way to church , hopefully no more clunking.
and now , i checked all of the other bushing on both side and they are all looking good.
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Old 08-08-2018, 02:26 PM
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What are the torque specs on these sway bar links?
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Old 11-09-2018, 11:23 PM
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Originally Posted by belarus27 View Post
yea it felt like it wasnt as firm as the new one

and on my way TO work and FROM work the car did drive straight , it went almost a mile straight by itself , but there was some clunking noise , so i figured i didnt tighten its good enough so after work had to fix that today.
will see hows the ride tomorrow morning on the way to church , hopefully no more clunking.
and now , i checked all of the other bushing on both side and they are all looking good.
Did tightening the sway bar links make the clunking noise go away for good?
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Old 11-10-2018, 12:59 AM
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Originally Posted by Danr View Post
What are the torque specs on these sway bar links?
https://workshop-manuals.com/mercede...on_front_axle/ + next page
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Old 06-16-2019, 03:10 AM
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W212
Yesterday I did the passenger side, I have change it by myself it was not very easy.

the clunking noise went away like magic.

my car did only 70,000 KM
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Old 06-16-2019, 12:07 PM
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In W212 MB changed SB links from soft bushings to steel joints. Now the price triple or more, while the grease-holding boots seem to be weak point and I had one shatter on my car.
MB will not sell you the boot, but I found one on ebay for about $3.
So I would add those boots to regular inspection service.
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Old 06-17-2019, 11:28 PM
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great job , any pics of the old bar?
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