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Old 09-24-2009, 04:29 PM
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Join Date: Dec 2002
Location: Jonesboro, AR
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Front Suspension Question -- 420SEL

The vehicle is a 191,000 mile 1990 420SEL. About two weeks ago, I began experiencing a bad vibration at around 65MPH, and every time I braked regardless of my speed. I was needing tires, and I just laid the problem off to bad tires. I purchased 4 new tires on Monday, and the installer told me that the right front probably needed a bushinig on the lower control arm because the wheel was jerking back and forth as he tightened the lug bolts. I made an appointment with my regular alignment guy for this morning, and he pointed out to me where the slack is, but his parts supplier did not show such a piece in his catalog. He thinks MB calls this piece a trailing arm, and that there must be a bad bushing where it terminates at the subframe.

I told him not to sweat the parts; I'll get them from Phil, but it would be nice if I actually knew what part to order. The piece in question connects at the lower control arm, then proceeds at about a 45-degree angle to a cube-looking "box" where it mounts to the subframe. I'd send pics, but it has been pouring rain all day, and my garage is a white oak tree furnished by Ma Nature. Any help would be appreciated.

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Old 09-24-2009, 04:42 PM
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Join Date: Sep 2009
Location: Great State of Texas
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Quote:
Originally Posted by Abner Mality View Post
The vehicle is a 191,000 mile 1990 420SEL. About two weeks ago, I began experiencing a bad vibration at around 65MPH, and every time I braked regardless of my speed. I was needing tires, and I just laid the problem off to bad tires. I purchased 4 new tires on Monday, and the installer told me that the right front probably needed a bushinig on the lower control arm because the wheel was jerking back and forth as he tightened the lug bolts. I made an appointment with my regular alignment guy for this morning, and he pointed out to me where the slack is, but his parts supplier did not show such a piece in his catalog. He thinks MB calls this piece a trailing arm, and that there must be a bad bushing where it terminates at the subframe.

I told him not to sweat the parts; I'll get them from Phil, but it would be nice if I actually knew what part to order. The piece in question connects at the lower control arm, then proceeds at about a 45-degree angle to a cube-looking "box" where it mounts to the subframe. I'd send pics, but it has been pouring rain all day, and my garage is a white oak tree furnished by Ma Nature. Any help would be appreciated.

epc.startekinfo.com

They need a CC, but it IS free. Shows all parts just like at the dealership.
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  #3  
Old 09-24-2009, 04:54 PM
pawoSD's Avatar
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Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 15,242
Quote:
Originally Posted by Abner Mality View Post
The vehicle is a 191,000 mile 1990 420SEL. About two weeks ago, I began experiencing a bad vibration at around 65MPH, and every time I braked regardless of my speed. I was needing tires, and I just laid the problem off to bad tires. I purchased 4 new tires on Monday, and the installer told me that the right front probably needed a bushinig on the lower control arm because the wheel was jerking back and forth as he tightened the lug bolts. I made an appointment with my regular alignment guy for this morning, and he pointed out to me where the slack is, but his parts supplier did not show such a piece in his catalog. He thinks MB calls this piece a trailing arm, and that there must be a bad bushing where it terminates at the subframe.

I told him not to sweat the parts; I'll get them from Phil, but it would be nice if I actually knew what part to order. The piece in question connects at the lower control arm, then proceeds at about a 45-degree angle to a cube-looking "box" where it mounts to the subframe. I'd send pics, but it has been pouring rain all day, and my garage is a white oak tree furnished by Ma Nature. Any help would be appreciated.
That is called a guide rod. You will likely need the bushing assembly....common wear part.

On fastlane this is the repair kit for it.


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