Front left wheel: whining sound on slowdown - Mercedes-Benz Forum
 
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post #1 of 9 (permalink) Old 03-31-2019, 09:59 PM Thread Starter
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Front left wheel: whining sound on slowdown

Trying to figure out what could be on its way out.

Brakes recently re-done, all OEM pads, rotors, sensors.

Now diagnosing steering & suspension components--expecting a few replacements given LA's lovely road infrastructure

On the freeway, driving perfectly straight on smooth ground, I get a revolving whine in the left side front wheel when the car is moving slowly after it has been driving a while (when I've noticed it most is coming into traffic on the 405 after cruising comfortably for hours).

It does not present when accelerating, or driving at high speed. Only when slowing down, and not related to braking. It feels like it has something to do with the wheel.

Stock springs and suspension (wheel isn't rubbing or anything).

Is this indicative of worn bushings? Tie rods?
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post #2 of 9 (permalink) Old 04-01-2019, 01:08 AM
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Rotational sounds are more often associated with wheel bearing issues. Try "loading" one side of the car or the other ie sweeping right turn would "load" the left side of the car, then try in the opposite direction to "unload" the left side. Listen for the sound to increase or decrease depending...

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post #3 of 9 (permalink) Old 04-01-2019, 07:50 AM
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Buy a tube of genuine M-B wheel bearing grease, a pair of new wheel bearing seals- and repack your wheel bearings.
If the races are not all scored already.
Then you'll need new bearings & races.

Sounds like your car has never been maintained.
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post #4 of 9 (permalink) Old 04-01-2019, 08:32 AM Thread Starter
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Originally Posted by Walt'89300CE View Post
Buy a tube of genuine M-B wheel bearing grease, a pair of new wheel bearing seals- and repack your wheel bearings.
If the races are not all scored already.
Then you'll need new bearings & races.

Sounds like your car has never been maintained.
bearings--I did not think of that. I've owned the car about a year--acquired with 67k miles on it. There was a maintenance gap between ~35k and my acquisition at 67k. Discovering the joy of bringing her back up to snuff.

Will touch back on bearings.
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post #5 of 9 (permalink) Old 04-01-2019, 08:51 AM
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If your bearings are really worn out at 67K, then you've got to really suspect somebody rolled the odometer back at least 100K or more.

Just sayin'
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post #6 of 9 (permalink) Old 04-01-2019, 08:56 AM
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I had a similar noise on our '95 E420 when we first bought it. Adjusted the bearings slightly and no issues since.
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post #7 of 9 (permalink) Old 04-01-2019, 10:26 AM
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67K miles- sorry, I must have you confused with someone else.
That's an almost new car.
Should change the ATF & filter, though.
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post #8 of 9 (permalink) Old 04-01-2019, 01:10 PM Thread Starter
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Originally Posted by sbaert View Post
If your bearings are really worn out at 67K, then you've got to really suspect somebody rolled the odometer back at least 100K or more.

Just sayin'
I don't disagree, though all maintenance documents received with the car purchase do support authentic mileage if nothing else.

Between 35k and 67k the car was exported to Hawaii (and brought back prior to sale). I'm inclined to believe only basic maintenance was done during this window, by local "European" technicians, perhaps on cost-sensitive direction from the owner. So I've been uncovering all the fun deferred maintenance.

I've spent $10k so far learning what to look for when buying a 124 and I'd do it all over again...

one half of my mind says "a car with this few miles shouldn't have these issues" and the other half says "but at the end of the day, you'll have a 124 with under 100k miles with (head gasket/wiring harness/AC/etc) ready for another 100K"
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post #9 of 9 (permalink) Old 04-01-2019, 01:28 PM
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Somethings wear by miles, some by age, and low miles often worse on a car of that age. Grease that doesn't get worked often separates.
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