winding noise after 2-3 mph + - Mercedes-Benz Forum
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#1 (permalink) Old 07-24-2007, 08:53 PM
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Question winding noise after 2-3 mph +

This is a real mistery, my 97 SL500 has this winding mid pitch sound coming from I think the front driver side area (sounds like behind the cluster).

I only happends when, the car hits 3 mph + and continue without changing pitch or very litle with speed variation. Even does it at 200 mph +

Tought it could be the spedo cable, but heard that all SL came with electronic spedo.

Lifted the car on all 4 and turned every wheels even started the car and placed in D and started spining the wheels and to my surprise no sound. Now I see that the sound only comes when the car is drive going more than 2-3 mph on the road.

Tought could be bearing but when turning the wheels when up in the air no sound at all. This is no a very loud sound but enuff for a new pasenger to notice and a reg driver to forget about it.

Anybody had this situation before,
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#2 (permalink) Old 07-24-2007, 09:11 PM
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you may want to take a look at your weather strip , sometimes it can be damged and lets air in , also make sure your window close all the way.

1995 SL500 red / black w/ ]RENNtech wheels. For sale
1992 sl500 red/tan 154k. 4sale also best offer.

Looking for 1999-2002 500sl or 93-1999 sl600
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#3 (permalink) Old 07-24-2007, 09:14 PM
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Quote:
Originally Posted by tjobeid
you may want to take a look at your weather strip , sometimes it can be damged and lets air in , also make sure your window close all the way.
This noise is present in all situation windows / top up or down.
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#4 (permalink) Old 07-24-2007, 09:17 PM
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put the car on a lift , all 4 wheels off the ground and start the car , give it a little gas and roll it to about 25 mph if there is not noise its just the wind coming into the car from the weatehr strip , if there is nois even on the lift , im clueless sorry.

1995 SL500 red / black w/ ]RENNtech wheels. For sale
1992 sl500 red/tan 154k. 4sale also best offer.

Looking for 1999-2002 500sl or 93-1999 sl600
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#5 (permalink) Old 07-25-2007, 09:42 AM
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Quote:
Originally Posted by Thierry2000clk


Lifted the car on all 4 and turned every wheels even started the car and placed in D and started spining the wheels and to my surprise no sound. Now I see that the sound only comes when the car is drive going more than 2-3 mph on the road.

Anybody had this situation before,
You can't be certain your wheel bearings are good by just spinning it while the car is on the lift. I have had experience with faulty wheel bearings that were quiet when it carries no load/weight.

You may consider having your wheel bearings/spacers visually inspected and measured to determine if the play (movement tolerance) is within spec., re-pack with appropriate lubricant, and torque as specified.

Good luck.

Last edited by edcarls; 07-25-2007 at 09:51 AM.
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#6 (permalink) Old 07-25-2007, 05:20 PM
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I'm going to trie your sugg, I'll let you know if the noise stops after the bearing job. Were could I get the exact specs and details on lub and work on hand.
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#7 (permalink) Old 07-25-2007, 06:32 PM
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The wheel bearing info is here V12 Uber Alles, Doing the Front Brakes in a W140 Mercedes Benz

Just to add I did mine and repacked with High temperature bearing grease
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#8 (permalink) Old 07-25-2007, 07:38 PM
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For us who have been around the block a few times.
Old school technology.
How to check fast .
Wheel bearings, struts,shocks,& mounts,tie rods ,half shafts
etc.
Front and rear suspension problems, if you are good.
You drive the car on an empty lot or something like that, about 20 mls per hr.
Move the steering wheel sharp left then sharp right a few times .
Be Carefull you don't want to throw the car in to a drift.
Listen for bearing noise, etc.
What you are trying to do, is load and unload the suspension half car at a time.
When left side or right is compressed (down) and noise is there,
You found the bad side.
Regards.
aam.
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#9 (permalink) Old 07-26-2007, 03:29 AM
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Quote:
Originally Posted by Thierry2000clk
This is a real mistery, my 97 SL500 has this winding mid pitch sound coming from I think the front driver side area (sounds like behind the cluster).

Does it purr..?
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#10 (permalink) Old 07-26-2007, 09:18 AM
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Quote:
Originally Posted by aam
For us who have been around the block a few times.
Old school technology.
How to check fast .
Wheel bearings, struts,shocks,& mounts,tie rods ,half shafts

aam.
Another "old school" method of testing wheel bearing is to lift your car and hold your tire with one hand on top and the other hand on the bottom. Then shake the tire by pulling the top while pushing the bottom and pushing the top and pulling the bottom repeatedly. You can tell your bearing is shot or need adjustment (shim) if you feel movement between the hub and the spindle.

If you can't feel any movement while shaking the tire from top to bottom, hold the tire with one hand in front and one hand at the back and shake it repeatedly. With this hand position you can observe your drag link for unusual (loose) movement and feel the movement between the wheel bearing/hub and the spindle.

If you can't feel any unusual movement in any hand position, your wheel bearing is ok and you may only need to re-pack and torque the main wheel hub nut to a tolerable play within spec.

You can apply the same procedures on your rear tires to test the bearings and other suspension components.

Last edited by edcarls; 07-26-2007 at 11:53 AM.
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