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Old 06-24-2015, 12:09 PM
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Screeching Brakes

 
Old 03-22-2015, 11:02 PM
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Squeaky Brakes. C400. Cold definitely the instigating factor. Happens below about 20 F. Brakes will do it as soon as they cool down after any driving. This winter has had record cold in Northern Maine with average temperature in February 0.4F, and March so far at 14.8F. Local dealership says hold tight. MB realizes issue, solution tested and changes in production. Sounds like rotor and pad upgrade will be the solution. May be 2-3 months before repair parts available. Hopefully before next winter!
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Old 10-18-2015, 09:47 PM
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Any updates for the brake? Mine starts squeeking now. but only happen for the first few seconds when I move. I don't know how it will end up when winter is here.
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Old 10-18-2015, 10:01 PM
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Originally Posted by arnold0523 View Post
Any updates for the brake? Mine starts squeeking now. but only happen for the first few seconds when I move. I don't know how it will end up when winter is here.
My dealer told me there is a fix now. I plan to get my C400 in after the first screech this winter.
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Old 10-18-2015, 10:59 PM
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Ha ha ha. Was just about to bump this. Had my first squeals tonight. First time it has got into the 40s after summer
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Old 10-19-2015, 10:13 AM
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Funny - I was backing out of my driveway this morning and had my first squeal. Definitely the coldest morning since I've had the car. Was fine the rest of my drive. Have to see if this is a consistent occurrence. It will probably be at the end of the winter by the time I have my first service appointment, so I'll need to to decide whether to take it in to be looked at or not.
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Old 10-19-2015, 10:35 AM
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Yesterday was the first time I heard a squeal from my brakes. I did a few high speed braking runs and the noise is gone.
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Old 10-19-2015, 10:46 AM
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Originally Posted by mtyson227 View Post
Funny - I was backing out of my driveway this morning and had my first squeal. Definitely the coldest morning since I've had the car. Was fine the rest of my drive. Have to see if this is a consistent occurrence. It will probably be at the end of the winter by the time I have my first service appointment, so I'll need to to decide whether to take it in to be looked at or not.
It will only be the first 1-3 times you hit the brakes after the car has sat for a few hours or overnight in the cold.
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Old 10-19-2015, 10:54 AM
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First time I had screeching brakes this morning, temps went down to under 40 overnight... Next up bleeding seats... fun fun...
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Old 10-19-2015, 11:03 AM
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was in VT yesterday with 30 degree weather, brakes were chirping on initial bite. ughhhh
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Old 10-19-2015, 07:57 PM
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I talked with my local dealer today. They said there's no service bulletin for this issue. The guy I talked with was searching the computer while we were talking. Any luck from your guys? It is definitely going to get worse as winter is approaching.
This morning it screeched like hell.
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Old 10-20-2015, 06:26 AM
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There is 100% a fix. My dealer found the bulletin and ordered new pads with different shim angles. Placed them on my front rotors and they do not squeak at all in cold weather. He said it was the same fix they had to do with similar brake pads in a recent S class model 2-3 years ago.
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Old 10-20-2015, 06:29 AM
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To add to this, I actually traded in my C400 a few days ago and own a C450, however, the fix was on the C400 and it worked without question. Also, interestingly, my C450 doesn't do it, either because the fix was part of the build or the larger brakes and/or different pads at the factory doesn't cause the squeak. I had my C400 for 1 month with the new pads and had temps as low as 24 degrees, car cold, no problems.
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Old 10-20-2015, 10:02 AM
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Originally Posted by jonandgwen View Post
There is 100% a fix. My dealer found the bulletin and ordered new pads with different shim angles. Placed them on my front rotors and they do not squeak at all in cold weather. He said it was the same fix they had to do with similar brake pads in a recent S class model 2-3 years ago.
Is there a service bulletin number I can refer to when I get to the dealership?

Thanks,
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Old 10-20-2015, 12:33 PM
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Refer Service bulletin document # LI42.10-P-060688

You can try to have your dealership pre-order the parts (i assume it's the braking pads) so that they can change them out in 1 visit.

Last edited by arnold0523; 10-20-2015 at 12:40 PM. Reason: Adding details
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Old 11-09-2015, 11:24 AM
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I have front brake pads and shims replaced. But I can still hear the screeching noise from the rear brake (not sure, but significantly less noisy, and probably not from front).

Did any of your guys change the rear pads/shims as well?
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Old 11-13-2015, 12:57 PM
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Alright, 55degrees in the morning today. Brake still screeching. ISSUE NOT FIXED.
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Old 12-09-2015, 11:52 AM
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any updates?

Has anyone had this fixed successfully? If so, what was the fix? Thanks.
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Old 12-09-2015, 12:38 PM
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now that its colder, my brakes squeak LOUD when im braking while reversing pulling out of the driveway. Forward it does not squeak.
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Old 12-09-2015, 12:45 PM
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Originally Posted by topsider View Post
now that its colder, my brakes squeak LOUD when im braking while reversing pulling out of the driveway. Forward it does not squeak.
same here. Forward occasionally squeak.

And that's after the fix from the bulletin.
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Old 12-09-2015, 04:26 PM
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When I was getting my snows put on I asked my local garage about this. He showed me the rust that forms almost instantly, from condensation, on the brakes. The perforated ones on the Sport were really bad. He said the pads hitting the oxidation are what's causing the noise, and it goes away as soon as the rust is gone.

Is this only affecting the Sport models with perforated brakes? I'm wondering if the solid ones used on the base and Luxury models have the same issue.
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Old 12-11-2015, 03:10 PM
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My wifes car has had this problem when backing up in the cold since we purchased in Jan 2015, it has had many tries to repair it. She is now on a list to get the complete braking system replaced to rectify the problem, MB is aware of it.

My bigger issue is that after the first attempt at repair they screwed up the alignment and it basically cost me two new front tires after 10k miles which they attributed to her style of driving... (they did actually pay for one, but that's a long story)
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Old 12-12-2015, 05:04 PM
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i had my front brakes replaced recently for a vibration, didn't help it
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Old 12-13-2015, 07:05 PM
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I also have the loud screeching in the mornings. This problem only started when the temperatures got cold (~45F). After a few screeches, the brakes "warm up" and everything is fine.

But still, the screeching IS very loud and shouldn't happen in such a pricey car. My brothers Honda Accord doesn't screech at all.
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Old 12-24-2015, 10:08 PM
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Any fixes for this yet?
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Old 12-25-2015, 04:22 PM
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Originally Posted by rakaye47 View Post
Any fixes for this yet?
There are small metal shims that are placed behind the pads that supposedly fix the problem. I'm having mine installed on 1/4. Only problem is it hasn't been cold enough this year in New England to produce the screech.
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