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  #1  
Old 01-15-2001, 01:25 AM
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I think my car runs great, but what do I know? So, I just had a local independent MB garage do their used car pre-sales check on my car so I could see what it might need.

One of the issues that they felt needed attention was replacing the "thrust mounts". Neither I, nor any of my local suspension shops know what they are talking about without doing another inspection. Any clues?

[Edited by longston on 01-15-2001 at 12:31 AM]
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  #2  
Old 01-15-2001, 11:55 AM
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yal yal is offline
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When I did my service on my car they called it the 'pushing struts'. I found out its actually one of the multi link components of the rear suspension. Its the bottom one that points forward at a 30 degree angle. I have a picture I can email you if you want.
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  #3  
Old 01-15-2001, 02:09 PM
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Wrong End?

Nope, Yal, but thanks for the reply.

They list them as "Front Suspension Thrust Mounts". The parts would be $166.00, and labor is 3.5 hrs @ $78 per for a total of $439.00. Then I need an alignment @ $65.00. Total $504.00.

The killer here is that they aren't a shop that is set up to do this kind of work, so they would be sending it out. I decided to pass, and either do the r&r myself, or have the work done by a suspension shop.
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  #4  
Old 01-15-2001, 02:43 PM
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Have you called your local M.B. dealership to speak to a service rep? My dealership is EXCELLENT and will help in any possible way---even if all I need is info or direction with a problem! However, from reading the responses from others, some owners are not as fortunate.
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  #5  
Old 01-15-2001, 05:05 PM
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What you are looking for is part# 126 330 13 35. We call them caster mounts. Some people call them rear ball joints/front suspension.

They do list for $83 a piece but should be available for a lot less. They cause a clunk when passing over minor bumps. If the boots are broken they are always bad.
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  #6  
Old 01-15-2001, 05:29 PM
Q Q is offline
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My mechanic called them brake force guide rod bushings. They were at the rear end of the rods that run somewhat perpendicular with the car's frame on the front suspension and connect with the lower control arm. I did mine myself on my W126 and can tell you it is a pain with everything else still in place. If the springs were out, it would be easier as everything wouldn't be under load.

If you do it yourself, make sure to measure the total length of the rod to where it meets the mount for the bushing, as the bushing's threaded coupling was a slightly different length on the replacement parts I got.
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  #7  
Old 01-15-2001, 06:07 PM
Wm. Lewallen
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I believe what your car needs are called "track rod mounts". They cost about $60 each and there are two of them.
I replaced the ones on my wifes 1983 300SD myself. Nothing special in doing it. You should have the car alligned after installing them. Midas did mine for $39.95.
A friend of mine had them installed at a small auto repair shop in East Tennessee. Name of the town? Parrotsville, Tn.So I don't think anything special is required. Good luck.
Bill Lewallen Lexington,Ky.
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  #8  
Old 01-15-2001, 06:20 PM
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Wow...so many names for the same thing?
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  #9  
Old 01-15-2001, 06:59 PM
Wm. Lewallen
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Call them what you want to. The track rod mounts look a little like motor mounts but they are installed in a horizontal position.
If they are worn,you will get a clunking sound when you go over a bump. When mine were bad all the "experts" said I needed new shocks. So much for "experts".
Bill Lewallrn Lexington.Ky.
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  #10  
Old 01-15-2001, 07:00 PM
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You Say Tomato...

And the winner is:

STEVE! Because he's a real MB tech...

But I'd like to thank our other contestants for playing, "What's That Part". I'd send you a copy of the home game, but you're already playing it...

So, let's ask our lucky winner the bonus round question:

Steve, am I better off having this procedure done for me, or is this a DIY project, and if so, what's involved?
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  #11  
Old 01-16-2001, 08:27 AM
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I call mine "Bob", but that is another story all together.

I did the job in my garage, but I have an arbor press and infinite patience. It is difficult to hold the supporting joint mount to press the part out of it. It is difficult to hold the supporting joint mount to press the new part in, and the new part gets feisty and squirms around, too. I am sure shops have a fixture, probably better than the one I fabricated, to hold this. Ensure you replace the "captured nuts", (wrong name, I know, but Bob was taken), which are inside the mount. They seem to have some sort of thread locking insert in them. Might be easier to pay someone who knows how to do it than to wrestle with it. Also, you need to be careful to indicate where the suspension is, as the threaded rod portion of this part adjusts the alignment.
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