Hey all,

My new G63 was making squeaky braking noises at around 5000 KMs. It went away and now it's come back even squeakier... I'm at 10k KMs so I don't know what the issue is (if it's even an issue).

It goes away if I ease on the brakes slightly or if I brake really hard. But if I brake normally, it just squeaks and it's quite embarrassing to be honest.

Any cleaners or something I should try on the rotors? Anyone experience the same thing?

 

it's a known malady that ails the G (and other performance SUVs that would have been better off with ceramics)
the sad part is all aftermarket solutions are a waste of time and money.
the good thing is they wear out pretty quickly.

 

That’s the key point ….. why the hmf aren’t there ceramics on this truck?????

 

Carbon Ceramics on (what is supposedly) a heavy duty off road vehicle?

RIP $10k rotors everytime a stone/branch/rock touches them

 

Dude come on ….. you’re saying they shouldn’t put ceramics on because it theoretically can go off road but never will? My Urus has off road modes and ceramics and somehow the logic gods let that happen. It’s just MB cheapness, and I’m already out 11k for my first brake replacement. I’d happily trade that for the nightmare brakes with extremely high replacement cost we have now.

 

Wait... my brakes are bad???

 

When temps got above 60F/15.5C, brake squeal stopped for me. I've also just changed to Disc Italia hyper ceramic pads and they have been quiet so far. But then again, the temps here in NY have been pretty warm so I won't know if it solved the squeaky brakes problem for me until next winter. However, they definitely generate way less brake dust on the wheels.

Front set: $270 Part # HCD2238
Rear set: $250 Part # HCD2239

 

I had squeaky brakes on my G63 early on. The dealer repalced the pads and did a couple other things (all under warranty) and they were fine ever since. They CAN be fixed.

 

Part of the G appeal and niche is its militant history and hardcore offroading ability. Addition of of CCB will simply throw all that heritage out the window - regardless of whether these cars ever see a grassy hill let alone a proper 4x4 trail

MB ain't gonna risk that

 

I think less than 5% of current buyers of G63 would stop buying if CCB were added. The legacy is firmly in place. Further, the G63 is an absurd vehicle that is in no way equipped to be a “hardcore off-roader.” It’s a high performance luxury SUV.

 

So lets get this straight, you are complaining about the replacement cost of the G's brakes yet you want them to implement carbon ceramics which would cost close to double the amount to replace? Sure the replacement interval is longer but doesn't make sense.
Not to mention carbon brakes are good for track use, but pretty jarring for everyday use. My GTC has them which is appropriate, but I think it would feel odd in a G.

 

“Sure the interval is longer”????

Gaslighting 101.

it’s like 3-5x longer considering how quickly they fade on this truck, or more if you live in the northeast.

but I give up … i forgot that the G63 is a military spec off road vehicle with 563hp and sport tires bought entirely by purists. My bad.

 

Yup we're all wrong and you are the only correct one! Might want to apply some brakes to your salt levels.

 

True, however, I think all G owners secretly dream of an armageddon event where we run over zombies to safety while everyone else in their "mortal" cars get bit? No? Just me?

But by your logic, maybe they should lower the ride height so it can fit into carparks? Maybe remove the locking diff? What about a FWD version for city driving only?

Most OTT luxury things have engineering abilities that nobody will ever use. Like very high end luxury watches. Most of those watches will only see a few splashes of water in their life, let alone make it 100m deep in the pacific. Who uses an actual chronometer?

 

No G63 experience but with a number of other vehicles, some heavy/powerful with large brakes, I found to address light squealing/squeaking brakes a good washing of the brakes helped. This removes dust build up which in this context the build up of most concern is the dust that is on the piston dust pads. This dust can interfere with the natural tendency of the pistons to retract when the brake pedal is released. This retraction action arises from the piston seals. But these seals can't generate a lot of force. Normally the force they generate is sufficient but with brake dust on the boots...

If the pistons do not retract this can lead to one or more pads remaining in slight contact with the rotor. This produces a mild glazing which is where the squeal/squeak comes from.

Wash the brakes. No need to jam the wash nozzle down close to the pads/piston dust boots. I use the wand soap setting then follow with the wand setting set rinse then finish with the no spot rinse setting.

To get an idea of how much brake dust there might be, the 1st time start with the regular rinse setting first to see what the water rinses off the brake (and wheel). In my experience this water will be quite dark with brake dust. Sure some dust is from the wheel which is harmless (though somewhat unsightly) but some comes from the dust boots.

Be sure to after you wash the brakes to use the brakes some as you drive out of the bay to remove some water. Then on the road arrange to use the brakes enough to get them hot to dry not only the exposed brake hardware thoroughly but any emergency/parking brake hardware which can be inside the rear wheel/brake hubs.

In fact I treat the just washed brakes to a mini brake bedding in process of at high way speed applying the brakes to cause a pretty good slow down and doing this several times in rapid succession. The idea is to get the brakes hot and remove the glaze that has developed. As with the regular brake bedding in process you do not want to bring the vehicle to a complete stop just a slow down from say 65mph to say 50mph in a rather aggressive manner although you want to be sure you can do this without causing any issues with other vehicles on the road.

After the brakes are hot then drive normally long enough the brakes cool down.

I find the washing process helps eliminate brake squeal/squeak. But it doesn't last. As soon as one uses the brakes after the wash the brake dust begins accumulating again. It is the consequence of having large powerful disc brakes.

 

While I'm not an expert on ceramic brakes I can only speak to my experience. I've owned three Porsche's ( 911 TurboS, 911 Targa 4S and a Cayenne GTS) with ceramic brakes.

All three cars had the squeaky brake syndrome - and for all three I was told its not unusual and there was nothing Porsche service could do.

In fact the Cayenne GTS brakes squealed so loud and it was so embarrassing ( my wife refused to drive the car which wasnt a bad thing if you know what I mean) after a year of owning it I traded it in for my G63.

Guess what - the brakes on the G63 also squeak - but not as bad and I love the car so I don't care.

Maybe its just me - but be careful what you wish for

 

Aftermarket ceramic brake pads (yes I know aren’t true ceramic brakes) do squeal but much less. I love them because they create a fraction of brake dust compared to OEM.

 

Had the same thing on my 21g63. Took it in for annual service, and they replaced my pads for free. Its a known issue.

Still squeaks a little, but not like it did.

 

we just got our G63 (used) but the brakes squeaked badly so MB replaced our pads under warranty and that seems to have solved the issue.

 

Same here - squeaky brakes, had MB replace under warranty within a month. It's a common issue and complaint.

As for the CCBs - should definitely be an option for those who want to pay more! Why not!?