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Rear disc hub rust - normal?

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Old Dec 8, 2019 | 04:03 PM
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2018 c63
Rear disc hub rust - normal?
Hi- 2018 July c63. Cars covered 15k miles now but at 12k and just over 3 months ago I had all my discs and pads replaced under warranty as they had a slight vibration. Since replacement the brake dust on the rears has been crazy. Despite cleaning regularly the dust seems to be corroding my calipers/ staining the tyre brown/ it’s impossible to clean off the wheels, and also the discs themselves look a rights state.

Should rear discs look like this after 3 months? Will the dealer do anything if I complain?







when fitted 3 months ago...






Last edited by NJ 1161; Dec 8, 2019 at 04:44 PM.
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Old Dec 8, 2019 | 10:38 PM
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2015 C63S ,DME Tune, KW Has ,Kmac Bushings,BC Forged wheels,Gt Rotors,Porterfield R4S,Modal Intake
Yes ...common . When I replaced my brakes I painted my rotors flat aluminum high heat paint and so far so good
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Old Dec 9, 2019 | 11:43 AM
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My 18' sits outside 24/07 and does not have any rust (only brake dust which can be easily cleaned with a power washer). I don't drive it in snow or if dry/wet salt is still lingering.
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Old Dec 9, 2019 | 02:41 PM
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I say not normal. These, like BMW's and many others have a coating that is to prevent that rust. 10k miles here and no rust
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Old Dec 9, 2019 | 03:11 PM
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Originally Posted by Chino075
My 18' sits outside 24/07 and does not have any rust (only brake dust which can be easily cleaned with a power washer). I don't drive it in snow or if dry/wet salt is still lingering.
Mine is garaged and seen no snow. For context in uk, and the three months fitted are Autumn milder months, so a bit of rain and average temps, but certainly no extreme temps or conditions. My rear brake dust is also impossible to remove, and wheels have protective wax coating applied. No chance of removing with a jet wash! Fronts in comparison are fine.



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Old Dec 9, 2019 | 03:15 PM
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Originally Posted by 507AMG
I say not normal. These, like BMW's and many others have a coating that is to prevent that rust. 10k miles here and no rust
I’d think so. Fronts are fine. Will a dealer entertain my complaint? Are your rear wheels covered in brake dust? My rears are literally ingrained in dust that’s impossible to remove!
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Old Dec 9, 2019 | 06:19 PM
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Old Dec 9, 2019 | 11:45 PM
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I spray paint new discs with black Hammerite Smooth weeks prior to fitting .

WOT no rust .
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Old Dec 10, 2019 | 09:29 AM
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Originally Posted by NJ 1161
Mine is garaged and seen no snow. For context in uk, and the three months fitted are Autumn milder months, so a bit of rain and average temps, but certainly no extreme temps or conditions. My rear brake dust is also impossible to remove, and wheels have protective wax coating applied. No chance of removing with a jet wash! Fronts in comparison are fine.
Wow that makes it even more unacceptable to have rust! You already can prove to them that the front has almost none so it makes no sense the rear is rust happy. If dealer doesn't want to entertain you, then the only thing would be as others suggested spray a rust protection layer.
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Old Dec 10, 2019 | 10:09 AM
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