Rear alignment problem on '72 250 - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 09-04-2011, 02:31 PM Thread Starter
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Rear alignment problem on '72 250

I have a customer who has a 1972 Mercedes 250 which is severely wearing the left rear tire off on the inside. The Michelin tires have less than 2500 miles on them. It has worn the tire right down to the wear bars on the inside and the outside of the tire is like new yet. The tires have never been rotated, so it's not a case of that particular tire being on the front, where it could have been damaged by a front alignment issue. When viewing the car from the rear, you can see that the left rear tire is tipped in to the inside. However, the car does drive fine with no noticable steering or suspension issues.
I checked the bushings on the left rear control arm and they seem to be fine. Although there is no visible damage, it appears to me that the control arm itself is bent. I know that it is not a matter of rust weakening the control arm---this 250 has always been garaged and it has only 67,000 miles on it, so everything is structurally in good shape, on the underside. I checked with my front end alignment guy, who looked it up and said there is no adjustment for the rear alignment on a '72 250.
Has this ever been a problem with the 250's and are replacement control arms available?
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post #2 of 4 (permalink) Old 09-04-2011, 02:47 PM
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The rear springs are causing the problem, check your ride height with 300 lbs on the driver's front seat. You will see what I mean about the springs. Ride height on that side will be lower, much lower.

As far as the lower control arm being bent, I would say nearly 100% impossible without damage to other suspension parts, not to mention you would see some kind of damage around the trailing arm mounts (body side).

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1. You're talking about god, there has never been any god of any kind. EVER!

2. I just have a general dislike of you.

3. I am trying to tell you how to fix your Mercedes and you are not listening.

4. I'm flirting with Jody.

5. You're just to dumb to own a Mercedes, and should go buy a Honda.
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post #3 of 4 (permalink) Old 09-04-2011, 04:11 PM
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I agree with Mercedes Mechanics in that the rear springs should be the first suspect. Rear control arms are available. The price? $2,100 per side.

Felicita e un bicchiere di vino con un panino.
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post #4 of 4 (permalink) Old 09-04-2011, 07:14 PM Thread Starter
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Thanks for the quick reply! This should be an easy fix. Are new coil springs available out there somewhere?
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