W211 AMG Discuss the W211 AMG's such as the E55 and the E63

Thrust arms

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Old May 9, 2016 | 09:25 PM
  #1  
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2005 E55
Thrust arms

Went for alignment and mechanic told me 1 of the front thrust arms were gone. He said I needed the following:

Thrust arm
Thrust arm bushing
Bushing cover
Bolt

He said might as well replace both sides. Only caveat he won't install anything but Mercedes oem made in Germany.

I can find the thrust arms but is there an additional bushing & cover?
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Old May 9, 2016 | 10:09 PM
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First, find another mechanic.

Next order new thrust arms and control arms. They come with new bushings and ball joints installed. Cost is about $310 USD from Partsgeek.com.

Take these to your NEW mechanic and pay him to install.

You can spend the money (approx $12 USD each) for four each "eccentric bolts" from Pelicanparts.com or autohausaz.com and install those at the same time. Easiest to do so at this time and it provides room to adjust caster and camber in the future.

Did I say, "find another mechanic"? It is not his call to tell you what parts you want to install. You pay him to install. Period. If it doesn't work, it is on you, not him.

Last edited by bbirdwell; May 9, 2016 at 10:13 PM.
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Old May 9, 2016 | 10:14 PM
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I was a little surprised he won't install anything non genuine Mercedes. He is a master tech gone solo but is very rigid in his ways. He believes that if it's not made in Germany its not worth installing. Especially suspension. He also warranties all his labour on oem parts for a year. Won't on anything else.

I am thinking about doing this myself. Doesn't seem too difficult if I put out for the tools.
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Old May 9, 2016 | 10:20 PM
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Here are the parts he is talking about. Just order aftermarket. If you are stuck on OEM, search factorymoparparts.com. Same parts. Same MB part number. Cheaper. Print out the price and take it to the local MB dealer and ask if they can match the price plus shipping. Worked for me everytime. I get a price break and my local dealer still makes a profit.
Attached Thumbnails Thrust arms-w211-front-suspension.jpg  
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Old May 9, 2016 | 10:31 PM
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If you plan to do it yourself you need to deflate the air springs. To do that, an SDS or Xentry system makes it easier. FWIW, I rebuilt the rear suspension on my '05 E55 (two days DIY), then took it to a local independent for the front suspension work (I was beat down at that point). For comparison purposes, the independent mechanic replaced the following for $1650 USD labor (parts not included):
-both front thrust arms
-both front control arms
-both front air springs
-engine mount
-transmission mount

So...this gives you an idea of cost. Now, there is an excellent thread on replacing the front control and thrust arms here on the Forum; you'll have to search because I'm lazy but it is a good DIY with photos. I almost did the work myself but time constraints worked against me.

Good luck to you. Enjoy your ride.
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Old May 10, 2016 | 01:07 AM
  #6  
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04 E55 AMG
I did this not to long ago was really easy took a couple of hours.

https://mbworld.org/forums/w211-amg/...trol-arms.html

here is the DIY that I typed out hopefully it helps. It is for Thrust arms I made an incorrect title! Any questions feel free to send me a PM
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Old May 10, 2016 | 01:10 AM
  #7  
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04 E55 AMG
Originally Posted by bbirdwell
If you plan to do it yourself you need to deflate the air springs. To do that, an SDS or Xentry system makes it easier. FWIW, I rebuilt the rear suspension on my '05 E55 (two days DIY), then took it to a local independent for the front suspension work (I was beat down at that point). For comparison purposes, the independent mechanic replaced the following for $1650 USD labor (parts not included):
-both front thrust arms
-both front control arms
-both front air springs
-engine mount
-transmission mount

So...this gives you an idea of cost. Now, there is an excellent thread on replacing the front control and thrust arms here on the Forum; you'll have to search because I'm lazy but it is a good DIY with photos. I almost did the work myself but time constraints worked against me.

Good luck to you. Enjoy your ride.

Doesn't the air suspension deflate automatically when the tires are up off the ground? I always find my suspension deflated when I lower my vehicle after having it up on the jack stands with my tires suspended in the air.
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Old May 10, 2016 | 05:59 AM
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Originally Posted by gjunon
Doesn't the air suspension deflate automatically when the tires are up off the ground? I always find my suspension deflated when I lower my vehicle after having it up on the jack stands with my tires suspended in the air.
Only if you open the door or wake it up with the key.
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Old May 10, 2016 | 06:14 AM
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Originally Posted by Hotsauce55
Went for alignment and mechanic told me 1 of the front thrust arms were gone. He said I needed the following:

Thrust arm
Thrust arm bushing
Bushing cover
Bolt

He said might as well replace both sides. Only caveat he won't install anything but Mercedes oem made in Germany.

I can find the thrust arms but is there an additional bushing & cover?
Mercedes doesn't make many suspension parts, if any. They sub it out. Lemforder was the original manufacturer of the thrust arms. They had a plant in maine, but moved somewhere cheaper.

I can see where your mech is coming from, but an overpriced box isn't the only path to quality.

Pelican parts often lists the OEM brand and the one in the MB box, also a quality rating for your other options.
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Old May 10, 2016 | 08:31 AM
  #10  
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2005 E55
Originally Posted by bbirdwell
Here are the parts he is talking about. Just order aftermarket. If you are stuck on OEM, search factorymoparparts.com. Same parts. Same MB part number. Cheaper. Print out the price and take it to the local MB dealer and ask if they can match the price plus shipping. Worked for me everytime. I get a price break and my local dealer still makes a profit.
That helped a lot, thanks! About the bolts, do I need 4 or 2? The thrust arms already have the bearings, so that works out well.

Originally Posted by gjunon
I did this not to long ago was really easy took a couple of hours.

https://mbworld.org/forums/w211-amg/...trol-arms.html

here is the DIY that I typed out hopefully it helps. It is for Thrust arms I made an incorrect title! Any questions feel free to send me a PM
Had a good read there, thanks for doing that. I'll start with the questions right away, what did you do about the air bags? Based on your post I am guessing you must have opened door or put key in ignition?

Originally Posted by StarvingArtist
Mercedes doesn't make many suspension parts, if any. They sub it out. Lemforder was the original manufacturer of the thrust arms. They had a plant in maine, but moved somewhere cheaper.

I can see where your mech is coming from, but an overpriced box isn't the only path to quality.

Pelican parts often lists the OEM brand and the one in the MB box, also a quality rating for your other options.
I think I'll go the Lemfoerder route. The Genuine Merc stuff is another $80 or so per arm. Not sure its worth it or if they are any differences.

Originally Posted by bbirdwell
If you plan to do it yourself you need to deflate the air springs. To do that, an SDS or Xentry system makes it easier. FWIW, I rebuilt the rear suspension on my '05 E55 (two days DIY), then took it to a local independent for the front suspension work (I was beat down at that point). For comparison purposes, the independent mechanic replaced the following for $1650 USD labor (parts not included):
-both front thrust arms
-both front control arms
-both front air springs
-engine mount
-transmission mount

So...this gives you an idea of cost. Now, there is an excellent thread on replacing the front control and thrust arms here on the Forum; you'll have to search because I'm lazy but it is a good DIY with photos. I almost did the work myself but time constraints worked against me.

Good luck to you. Enjoy your ride.
Mechanic wanted the equivalent of $230USD for both thrust arms which could save me some headache & time but will have to pony up the Genuine parts premium. What can I do with the airbags given I don't have SDS yet. Don't want to blow anything up lol
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Old May 10, 2016 | 08:37 AM
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they are really easy to install. and you don't have to deflate really. I was lazy and my laptop battery was dead so I didn't hook up DAS. I did both sides thrust arms and control arms in 4 hours. 2.5 for first side, 1.5 for the second side.

Last edited by thtguy; May 10, 2016 at 08:54 AM.
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Old May 10, 2016 | 08:56 AM
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Priced out everything, seems vendors (AutoHausaz, PartsGeek & PelicanParts) are pretty close low of $339 & high of $347 shipped. Any recommendations on who to buy from? I have purchased from AutoHausaz before with no issue.
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Old May 10, 2016 | 08:56 AM
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Originally Posted by thtguy
they are really easy to install. and you don't have to deflate really. I was lazy and my laptop battery was dead so I didn't hook up DAS. I did both sides thrust arms and control arms in 4 hours. 2.5 for first side, 1.5 for the second side.
Did you have a balljoint tool?
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Old May 10, 2016 | 12:53 PM
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if it helps

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Old May 10, 2016 | 01:33 PM
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Lemfoerder is a sufficient brand and the OEM supplier so you can't go wrong there. Plus, they come with a pretty good warranty from us. If you have any questions or need any assistance please do not hesitate to let me know.

http://www.pelicanparts.com/catalog/..._pg3.htm#item6
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Old May 10, 2016 | 02:08 PM
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Originally Posted by Hotsauce55
Did you have a balljoint tool?
yes Ball joint seperator from harbor Freight did an excellent job. I didn't do anything with my brake part either left all of it intact. oh did upper Ball Joints on both sides also, those were like 5 mins each.
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Old May 10, 2016 | 02:18 PM
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Originally Posted by thtguy
yes Ball joint seperator from harbor Freight did an excellent job. I didn't do anything with my brake part either left all of it intact. oh did upper Ball Joints on both sides also, those were like 5 mins each.
Did you use a press to get the old upper ball joints out?
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Old May 10, 2016 | 02:54 PM
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Originally Posted by Hotsauce55
Did you use a press to get the old upper ball joints out?
No press needed for upper joints. The new ones come already pressed into the removable brackets.
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Old May 10, 2016 | 02:56 PM
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04 E55 AMG


How to remove and press in the lower ball joints if you need to do them. It wasn't hard.

Last edited by gjunon; May 10, 2016 at 02:57 PM. Reason: Spelling
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Old May 10, 2016 | 10:02 PM
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Originally Posted by Hotsauce55
Did you use a press to get the old upper ball joints out?
Uppers have 3 bolts that hold them in the control arms
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Old May 10, 2016 | 10:07 PM
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Guys do I need 4 or 2 of the bolts for this job?
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Old May 10, 2016 | 10:13 PM
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Originally Posted by Hotsauce55
Guys do I need 4 or 2 of the bolts for this job?
I used the original bolts just torqued to spec
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Old May 11, 2016 | 11:05 AM
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4 bolts like I wrote in a previous post. Just install in the "neutral position" (slot vertical). If you need to adjust the caster or camber, the bolts are already installed and you just rotate the bolt to place the slot in the 3 o'clock or 9 o'clock position. Since you have to remove the original bolts anyway, just install the eccentrics now. They won't hurt and they might help.
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Old May 11, 2016 | 12:01 PM
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I asked because I only saw 1 bolt (part 165) in your diagram. I have not taken the time yet to actually look at the suspension on the car.
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Old May 11, 2016 | 01:01 PM
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You want something like this:

http://www.pelicanparts.com/catalog/..._pg3.htm#item6

Limited adjustability but better than nothing. Provides 3mm inward or outward movement which translates into +/-0.3 degrees of camber change. You can always trade caster for camber.
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