Spiznasty

Hey everyone I was looking for some help, and was wondering if anyone had the same problem. I have a 2018 C43 Coupe, which is about 3 months old and has just under 1600 miles on it. Starting about 3 weeks ago I started getting severe squealing and brake noise which seems to be coming from my driver's side front wheel. It only happens during normal stop and go braking at slower speeds, and I also hear the squealing at times when making turns even when not applying the brake. I recorded the noise and wound up taking my car in for service. I gave the service tech the video, and even with that, they said they naturally couldn't replicate the noise to the levels I was experiencing it at. They checked the brakes, rotors and sensor and couldn't find any problem with it and the car was turned back over to me.

The noise was still happening and I wound up calling the service tech back and made another appointment coming up this Friday. She told me that some of the coupes make have been known to make brake noise but the noise I'm getting is anything but normal. It sounds like if my brake pads were made out of cactus. I see 20 year old cars driving around which make no noise whatsoever yet my 3 month old car will wake up the neighborhood with its brakes. The tech also told me that when I take my car in they will be shaving down the pads and lubricating the brakes to see if that helps. My question to anyone that has one of the newer coupes, have any of you had this problem? Any idea what could possibly be causing this? Any help would be appreciated!

Lawag1995

Mine just started doing this today. 2018 C43. No indication of anything until suddenly today. Very loud, metallic, dragging caliper type noise. Did you get an answer for your problem? It sounds identical.

Rubesss

Ive had a C450 for 3 years now, needed to replace pads annually and I notice they wear pretty fast. They squeak even after replacing the rotors.

Spiznasty

When I brought my car back a second time for this I was told by the service advisor that they would be replacing the brake pads on the driver's side where the sound was coming from. The tech did confirm the squealing sound, and even though that this is something that generally is not covered by the warranty and I would have to pay for it, they actually wound up covering it in the end. After the repair it actually made things normal again for about a month and a half, but then the squealing just started happening yesterday again. When I'm braking, and even just driving without applying the brake I hear it. The advisor told me originally this is normal on the new C coupes but this is ridiculous. If it keeps up I'm going to a service manager to see if I can get somewhere with this.

Standingoten

DRLC43

FirstMBAMG

Squeaky brakes are very common on performance vehicles. Every performance vehicle Audi, Range Rover, Mercedes, that I have driven has had squeaky brakes particularly at cold times. Good to know the dealers may replace them though under warranty...

Spiznasty

Before this car I had a CLA45 and I didn't have that problem with that car. Maybe cause it had upgraded brakes compared to the stock ones. I expect some level of noise when braking, but I get a steady squealing sound when I'm just driving as well and not braking which leads me to believe there's some sort of problem. But lol knowing that Mercedes answer to the problem is turning up your radio. I just came back from running errands and during the entire time I didn't hear any noise except as soon as I got home when the squealing started without applying the brake, so there doesn't appear to be any rhyme or reason as to when this actually happens.

FirstMBAMG

Spiznasty

Thanks for the advice guys, I'll give that a shot and see if that helps at all.

RichardCranium3

YMMV, but a general performance pad bedding procedure is a near panic stop (80-90% braking) of 65mph-10mph, decreasing the top speed by 10mph increments down to 25mph (65-10, 55-10, 45-10, 35-10, 25-10), then repeating the sequence 2-3 times.

Spiznasty

Bedding the brakes seemed to have helped. I'll keep an eye on it, thank to you everyone that suggested that.

Completely unrelated, but I've also had this happen 4 times and it's always random. Sometimes I turn on my car and all my preset stations are deleted except for a couple of them. Anyone have this issue?

Josemx

1. First time: changed front brake pads, stopped the noise for 1 week
2. Second time: changed front brake pads and brake disk, noise stopped for a couple of months
3. Third time: all was good up until the date of the first scheduled maintenance (1st year) and apparently the noise came from the rear pads which were almost out and I had to pay for them. (Still skeptical that they were worn out at only 12,000km/7,500mi)
4. Fourth time: a couple of months later the noise came back from the front. The dealer said that the had to escalate the issue with the “factory” to get a solution. As of today I’m waiting for the front calipers to arrive from Germany.

After all these visits to the dealer they’ve might as well change the whole f-ing brake system.

It’s just ridiculous. Thinking about getting a BMW 4 series.

Polar.C43

I have this same exact problem on my coupe. I thought I was going crazy. I hear it even when I'm not using the brakes, pretty odd.

jonathan358

Had my 2018 coupe for 8 months and I still hear occasional squeaking. Usually happens when brakes are warmed up from stopping and I apply medium brakes. It won't squeek if I brake extremely lightly (basically starting to brake from a long way from a light) or if I brake very hard. Performing the bedding procedure seems to help. Note that the rotors rust up very very easily and that the OE brake pads shed a lot of material. Also, the rear brakes are automatically applied while turning for torque vectoring. But seeing as how your problem (and mine) seems to originate from front brakes, that may be out the window.

I have learned to live with it. People say it is a thing with "performance" cars/brake kits but I don't really see it happening with lambos and such lol.

Cosworth2000

I had this same problem and MB changed my brake pads under warranty. It just happened again after 1 year but I noticed I can manage it if I push a little harder on the brakes. It seems to come and go after I do this.

austaz