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Old 07-26-2011, 05:23 PM
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Cool Frustrated!! Help on a 1987 560SEL

Ok... I'm stumped... I've been chasing a lower speed brake squeal forever. I've put on new calipers, high end brake pads, anti-squeal gunk, and all new harware. Steal squeals. Driving me crazy. Could it be that the discs need to be turned? And if so, is there a DIY that can show me how to take them off? Any help will be greatly appreciated!!
Thanks;
JD

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Old 07-26-2011, 05:43 PM
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Do a search on wheel bearing. The procedure to get the rotor off is the same for servicing the bearing.

Sometimes the rotors will get a little lip on them that I think could possibly cause unusual noise. How many pads have you been through with the rotors that are on there?
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Old 07-26-2011, 05:47 PM
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Location: Dallas
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JD, yes the rotors can definitely be the culprit. I went through the same frustration when I replaced my first rotor set about 16 years ago.
Finally bought different rotors and the problem was instantly fixed.
I've used many brands of pads/rotors over the years, and never had the problem again. I actually stored those guilty rotors in the attic for several years, and they got a nice light rust coating. I used them later and they didn't squeak at all - go figure.

You generally don't turn the Benz rotors, just replace them with every 2nd or 3rd pad replacement. They do tend to wear quickly - about 40k miles.
If the current rotors are new, and you want to turn them to stop the squeal, then be sure they don't take much off. The min thickness is stamped on them.

To get them off, you must remove the bearing hub, chuck it in a big vise, and unbolt the rotors from the back side. Not too tough, and pretty straightforward, you just need to keep the bearing grease very clean by taping up the openings, or repack the bearings when you reinstall the hub. There should be a writeup in the diy section somewhere.

DG
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Old 08-02-2011, 01:35 PM
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Ok... removing the rotors on the front of my 560SEL was the single hardest thing that I have done. What a pain. When I got them off and took them in to get turned, they told me they couldnt turn them. So I bought new ones and installed them. Now it no longer squeals!! So after three weeks of chasing the squeal, it looks like I finally got it. Thank you to all of you who helped. Though it was difficult, your advice kept me in the game. Thanks again!!

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