speefspeed

All,

My 2018 E63s wagon is damaging steel rotors, I’m the second owner, first owner replaced first set at 7k miles, I replaced the second set at 11k miles and now, barely at 13k miles the rotors are once again vibrating which is more than likely the same issue - MB replaced everything under warranty

Car has been driven carefully, garaged and well cared for etc, never tracked, raced, abused in any way

The first diagnosis was that the wheels were over torqued, 110 lb-ft dealer adjusted back down to 95 I believe, same issue now - 2 owners

Stock wheels, rotors, pads, no mods

Does anyone have any ideas as to what could be causing this? I’ve owned over 30 sports cars over the years, I am very careful and have great “mechanical sympathy” never had this happen before, not even on track cars

Any guidance is greatly appreciated

thank you much -

bobblehead

Owner manual suggests 110 tq .. so overtorqued is unlikely the cause

Mbracer26

my e300 had bad rotors, dealer claimed run out. where if the tire is not properly mounted or torqued the rotors will be damaged.

Lucabratsi

Hello,
most likely you have a sticking Caliper piston. That will overheat the rotor and cause it to warp.
Cheers,

ecampbell

Crap 7K? Wow......

having said that I am at 11k and fronts are toast while rears are at about 75%.

curious what others are experiencing.

speefspeed

Thanks for the replies guys, looking at older threads on the issue, MB may have changed rotor spec in 2011 when problems started after

The sticking caliper piston theory maybe valid, but all rotors warp not just one... auto pilot braking, which is pretty much all the time on highway, dragging brakes and heating them up rapidly then cool down warps them

I only changed rotors less than 2k miles ago ... this is ridiculous for a high end sports car, 3rd time in a year

MuffinFlavored

you ran through rotors in 11k or pads?

Lucabratsi

Hello,
If all your rotors are warping, then its not a sticky piston. There is something wrong as you are saying with the nanny pilot breaking heating up all the rotors.
I shut all the nanny stuff off, even the ESP, by holding the button down. Anyway, MB should warrantee the brakes and rotors, and your dealer should do a diagnostic, and even a software update. I have 4K miles on mine, drive pretty hard, and the brakes are as new.
Cheers

speefspeed

Luca and all, thank you -

cnterline

2 sets of rotors on my GTS , 4000 miles , no track driving or crazy braking at all , my buddy is a MB Tech said lots of problems with rotors on new cars

PeterUbers

30k on original 2014 e63S rotors and no warping

E634Me

These are steel rotors we're talking about here, right?

At 11,000 on my 2018 and no hint of rotor warpage when I brake with my CCB equipped car.

speefspeed

Thank you - no warping does not explain the warping

I collect sports cars, have a good size collection, Ferrari, Lambo etc, I have never had any issues on steel brakes ever...

No matter what, warping rotors within a couple thousand miles is clearly an anomaly that probably has to do with the system and not the driver, since I’m the second owner and the first owner had the exact same issue

My money is on the autopilot dragging brakes - but end of day, what do I know

strange issue and very annoying

ygmn

Rmemeber lane assist also applies the rear brakes a bunch and on one side to pull car back into lane.

Turned mine off since it was to harsh and fearful of it just eating up brake pads.

speefspeed

I think that’s exactly what the root cause is

cnterline

Yes steel rotors , tech said possibly caused by the portion of rotor that sits in between brake pads ? Cools at a different rate
im not a metallurgist so don’t beat me up over the post ,just repeating what could possibly cause it ,I don’t beat on the brakes at all ,maybe I should lol

speefspeed

Hi Cnterline

not sure I understand, why would that warp some rotors and not others ? What application would cause these specific rotors to warp? They all work the same don’t they ? Thank you

cnterline

Stressing I’m no expert ,this is what I was told ,the large portion of the rotor in between the brake pads stays hotter longer after your done driving it ,possibly causing the warping , metal heated cooled at diff temp can cause warping , like I said no expert and no clue why 2 sets of front rotors have warped on me at 4000 miles on my 2017 GTS , dealer warrantyied them but prob won’t the next set , yeah a mystery

E634Me

At the AMG Academy they were constantly reminding us not to sit with the brakes held against the hot rotors and to make sure the parking brake was not set when we got out to switch drivers.

Letting the car sit with pads on a hot rotor is no good for the pad or rotor it seems.

Following a canyon or mountain run, I try to let the brakes cool, before pulling over for a stop.

Notable exception was the tire sidewall puncture I had mid way up the hill one time with an instant tire deflation. Had to pull over immediately and park. Was cringing on how the poor pads must have felt, but they don't seem any worse for it. Probably having the CCBs helps.

My other vehicles with steel rotors all have a bit of brake rotor warpage that you can feel on light stops as you roll up to a stop light. Not too bad though.

Foggy916

Agree that you should always let brakes fully cool after tracking or extreme braking and NEVER park the car while the rotors are hot. Most of the time the vibration is not warped rotors but instead from the stock brake pads melting onto the rotors so you get a vibration in the steering wheel when pressing the brake pedal. This will go away after a few weeks of normal driving where the pad material gets scrubbed off the rotors.. I had this problem with my M3 when tracking on stock brake pads and noticed this would occur mostly when I forgot to turn off the nannies and wasn't in M Mode.....what was happening was the car was constantly applying the brakes during high speed corners to keep it in line. Taking the car out of assist would remedy the problem or using track pads.
Reason I bring this up is maybe that's what's happening here....you're getting brake pad deposit on the rotors from the car possibly applying the brakes constantly thru some sort of traction/assistwith control system. Just a thought. What would be interesting is to drive it for a few weeks without any assist features and see if the vibration goes away. Then you will know it's your brake pads overheating and not truly warped rotors.

tonecas

Feel like what? Oscillating? And does it squeal when close to a halt?

speefspeed

Good points and advice on the pad rotor subject guys, thank you

speefspeed

or just inspect / measure rotors to see if they are warped

E634Me

Oscillating, no squeal. You can feel the high spots being contacted by the pads. Again, this is on my other vehicles with steel rotor, not the E63 which has CCBs. The E63 is smooth as glass . . .

ronin amg

Don't drive through puddles with hot brakes and stop..