Is this a rear LCA outer bushing issue or something else? (Video inside) - Mercedes-Benz Forum
 
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post #1 of 8 (permalink) Old 04-18-2019, 06:41 PM Thread Starter
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Is this a rear LCA outer bushing issue or something else? (Video inside)

I have a 1998 E320 and the rear driver side wheel area has a creaking noise that is driving me crazy. Every little bump causes a creak.

I've read through many threads and it seems the likely suspect is the LCA outer bushing. I've had the wheel off and I couldn't pinpoint the noise. I've had a (small garage) mechanic, who used a pry bar on the joints, and couldn't pinpoint it either. I've tried silicone lubricant but that didn't help.

Can anyone help me determine the issue?
I've seen some posts describe the LCA bushing as a squeak which makes me doubt whether the LCA bushing is the culprit. My problem sounds like a creak.
I've seen some posts say the problem can be the sway bar bushing but would it create a drastic noise such as in the video?

In the video, I am pushing the driver side end up and down. The sound doesn't occur when I push on the passenger side.

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post #2 of 8 (permalink) Old 04-18-2019, 06:56 PM
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Try item 7a in the diagram -



I don’t think you can get lube into it or a pry bar on it as installed.

It’s such a common wear item that I’d replace it at the first sign of squeaking and keep looking if that wasn’t it.

Sixto
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post #3 of 8 (permalink) Old 04-19-2019, 09:23 AM
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I'd be willing to bet that it's the outer LCA bushing. Sounds exactly like mine did. Ideally, you'll need a proper tool to R&R. Once you get in there, it's pretty easy to do. IIRC, the tool was around $100 on ebay. I used Lemoerder bushings. Here's a link to when I did mine a few years ago. It has pics of the bushing and tool: https://www.benzworld.org/forums/w21...pension-2.html


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post #4 of 8 (permalink) Old 04-19-2019, 10:21 AM Thread Starter
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Quote:
Originally Posted by tabijan View Post
Try item 7a in the diagram -



I donít think you can get lube into it or a pry bar on it as installed.

Itís such a common wear item that Iíd replace it at the first sign of squeaking and keep looking if that wasnít it.

Sixto
98 E320s sedan and wagon
02 C320 wagon
Maybe your right about the silicone not reaching that part. Probably explains why it didn't help. Based on my searches through this forum, 7a is lower control arm outer bushing or hub bushing.
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post #5 of 8 (permalink) Old 04-19-2019, 10:24 AM Thread Starter
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Quote:
Originally Posted by binuya View Post
I'd be willing to bet that it's the outer LCA bushing. Sounds exactly like mine did. Ideally, you'll need a proper tool to R&R. Once you get in there, it's pretty easy to do. IIRC, the tool was around $100 on ebay. I used Lemoerder bushings. Here's a link to when I did mine a few years ago. It has pics of the bushing and tool: https://www.benzworld.org/forums/w21...pension-2.html
Thank you. That's reassuring to have a lead on this issue. I was hoping someone with experience could recognize the problem by its sound. I'll order the LCA outer bushing and have it replaced and I'll update this thread so anyone in the future will know what the LCA outer bushing problem sounds like.
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post #6 of 8 (permalink) Old 04-24-2019, 07:54 PM Thread Starter
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Update: It was the lower control arm outer bushing that was making the noise.

Now I gotta find out why my seat controller moves my seat forward regardless whether I push the button forward or backward.
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post #7 of 8 (permalink) Old 04-24-2019, 08:02 PM
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Originally Posted by detonate View Post

Now I gotta find out why my seat controller moves my seat forward regardless whether I push the button forward or backward.
I had this problem with my CLK320. Its the door switch. I took mine apart and sprayed contact cleaner on it. Problem solved. Be really careful as the tabs and trim plate is really brittle on these car now.
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post #8 of 8 (permalink) Old 04-24-2019, 08:33 PM
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Quote:
Originally Posted by detonate View Post
Update: It was the lower control arm outer bushing that was making the noise.

Now I gotta find out why my seat controller moves my seat forward regardless whether I push the button forward or backward.
260e cruiser is correct.
Had the same issue on our neighbors 98 e320 - DS. I removed it carefully and cleaned it with electrical contact cleaner and then used compressed air to blow out any small debris build up. It's still to-this-day, working correctly (2 years later).
Stealership told the owner they deal with these on quite a few of their in-shop repairs and provide the same cleaning for their customers free of charge.
If it does re-occur again after the first cleaning, then they replace it.
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