JimGnitecki

My C63 brakes seem to be "squeaking", but ONLY when braking very lightly and coming to a stop. The noise disappeared briefly after I washed the car, but returned a couple of days later.

Is this dirt on the pads or rotor, or ?

Jim G

m a x i m u s

Brake dust.

Nando_514

It's inherent of more aggressive/harder compound pads. When the brakes are cold, they'll squeal. Try heating em up then try the light braking again. I can almost guarantee it won't be there... Temporarily

Alex.currie44

Jon M who you know tells me they find the pads tend to glaze from stop and go driving at low speeds assuming you have sufficient pad left.

It was suggested some more aggressive braking at speed occasionally will clean them up.

Since he told me this I will get up to 115 kph, keep the speed up with my right foot and drag the brakes for about 200 m and so far OK.

JimGnitecki

I wondered if something like this might help. I'll try it! Thanks, Alex.

Jim G

BLKROKT

Or do a handful of hard stops (80-20mph, hard, but not so hard as to cause ABS to kick in) in a row to get them hot, then drive 20min without braking to cool them off, that should do it. Like a mini bedding process.

C63fora2w1

Powerstop Z23 carbon/ceramic brakes don't squeak and work fantastic with no dust. I know where you can pick up a set pretty cheap if your interested.

AA717driver

This. I drive gently for a few days and the squeak returns, reminding me that "it's time".

TC

JimGnitecki

I'll try it!

Jim G

JimGnitecki

No, I don't want to spend the time or money (The car got new brake pads just before I bought it at the MB dealership in April), BUT when it comes time for brake pad replacement, THEN, yes that sounds like something to try.

Jim G

NotABaller

I seem to have this noise too, but I'm not too concerned.

More importantly, I get light steering vibration when braking normally at higher speeds. Is this indicative of low pad thickness?

Edit: Vehicle front pads had 4-5mm about 2 months ago. Rear pads had 6.5mm, so I dont think it's because of thin pads. Do I need wheel balancing?

JimGnitecki

The light steering vibration can be a symptom of slightly warped rotors, due to their getting hot under harder braking. These days, it is very common on most non-MB vehicles I have owned, due to cheaper rotors being used by the OEMs. My last Ford F150 exhibited it right from the factory!!

But I have no MB prior history to compare it to. My own C63 does not exhibit any steering wheel vibration on brake application at any speed.

Jim G

bentz69

Porterfield r4s and never look back. NO Sqeak/squealing EVER and much less dust then oem.

604 C63

Boom! There ya go.

C63fora2w1

I want to see a show down between the Poerterfield RS4's and the Powerstop Z23 carbon/ceramic. No Bull**** I would love to see a side by side comparison of the two and see how they perform. Darryl its too bad you live 5000 miles away from me we could set up a course and do some real testing.

604 C63

I think the concern there would be doing it over and over and over and over again. Longevity. And performance degradation.

Ive used the Porterfield a couple times now, with good success.
Ergo Im willing to spend a couple hundred bucks to go with what I know works, from the first day to the last day, especially since my kids ride in the car. I don't experiment with safety equipment.
Thats not to say I think you are at risk, but as you know I blow money in all kinds of ridiculous ways lol. I can come up with a couple hundred for this. Ill scrimp somewhere else.

C63fora2w1

I see it like a David and Goliath type of thing.. we know the porterfield are good but I see the Powerstop as the underdog who given a shot might be able to hold his own with the champ. Lets say we did some tests with the Porterfields from 60-0 and 100-0 and measured the distance. If the powerstop were within 10% of the Porterfields I would concider that a win.. if they matched them or even beat them it would be a grandslam. I am genuinely curious.

For those of you even remotely interested I found that the Bondurant race team is sponsored by powerstop brakes and use them in all their cars.

https://bondurant.com/powerhouses-speed-safety-join/

Ambystom01

That's like saying if the food doesn't give you diarrhea, that's a win for that restaurant and you'd recommend it to friends.

There's more to brakes than one-time stop distance.

C63fora2w1

I'd love to see any kind of comprehensive testing and let the results speak for themselves.

Ambystom01

Can't see many people wanting to spend a few thousand dollars comparing $50 brake pads to the trusted brands.

C63fora2w1

I don't know how you figure thousands of dollars? Porterfield about 350 bucks stock pads are about 800 bucks and if you already home them it wouldn't cost you anything. Powerstop is made by Centric a pretty well-known brand and use exclusively by Bondurant race team.

Your hypothesis is that your brakes are better simply because they cost more I say prove it let's do some testing and let the results speak for themselves.

Ambystom01

How much do you think it'll cost to accurately measure the effectiveness of the brakes? I'm guessing a few thousand dollars.

My hypothesis isn't that the trusted brands are better because they cost more. My hypothesis is that the trusted brands cost more because they have real experience behind them in designing and building brake pads for the luxury sports sedan market, which the $50 manufacturer lacks.

BLKROKT

That's a stupid comment David and Goliath blah blah. Do that with carbon bling, not with brakes. Seriously, no really seriously did you ride the short bus to school as a kid? I can't believe you actually think it's a good idea so "test" "underdog" brake pads.

And I Brett Farve does those copperfit commercials on TV. Are you runnning out to buy that **** too because of its magical healing properties? Do you believe everything you see on TV?

604 C63

Aaaaaaand thats why you dont send unsolicited dick pics.

C63fora2w1

If you are unwilling even to test two different sets of brakes then you have no basis for your claims that they are inferior. Have you even driven a car with a set ? No. I do daily and I can tell you there is nothing wrong with them. They are not a track pad but for a daily driver they are fantastic. Did you fail to see the link about Bondurant Racing School that uses them for performance driving school, road racing, Viper ACR, Challenger SRT, and Challenger Hellcat high performance driving. The hellcat is 4500 lbs and 707 hp if a performance school is willing to use them with students who they are liable for then that should lend some credibility. That car is also 500 lbs heavier than a 63 and has 257 more HP then a 63.

Your only basis for not liking them is they are not $500 a set. You have no evidence and are not willing to even test a set to prove they are not up to par. You have no scientific evidence to support your claim.


The copperfit reference is actually funny because I play golf with a guy who has pretty much everything they sell and I make fun of him every time we play because he thinks it helps him..