c230K415

Hey guys, I don't know much about brakes...but recently on my other car I did a pad swap (along with re-surfacing rotors) and that went all dandy...then today as I wash washing my car (beautiful day today) I wanted to check on how the pads on my C230 was doing...as I looked I saw a hole in my rotor...probably the size of a little pebble...it looks as if some little rock boucned up from the road and just punctured my rotor...I have no idea how this happened...if anyone can fill me in (maybe I am doing something that is unhealthy to my car?) I would greatly appreciate it. Also, I wash my car properly...I don't shoot water at the rims right after driving...I let it cool for about an hour prior to washing so I don't "warp" the rotors (I learned this forum's detailing section)...I attached some pictures...again, if anybody can fill me in on what is going on...i would appreciate it. thanks.

MB2006

it looks like casting difect , i dont know if they will cover it under warranty . but rotors are casted iron it looks like manufacturing defect .

advans

wow...that sucks! call up mbusa!

FrankW

that's my guess as well.

TREZ63

Doh! So does mine


Just kidding. Sorry.

rlee02135

hahaha...when i first saw this thread, i thought he upgraded to x-drilled rotors

whoover

Resurfacing rotors is not recommended for Mercedes brakes. You leave them alone until they're at the wear limit and then replace them. You should replace them now. Chances are you took them below the limit. They won't dissipate heat quickly enough, which could cause all sorts of problems.

c230K415

Thanks a lot man...but just to clear up I didn't re-surface the rotors on my benz (My mechanic already told me why and what not...) I re-surfaced the rotors on my other car...and I do think you are right...but I have about 28,000 miles on my car...and I don't drive aggressively...I dunno... Oh well...another reason for some slotted/drilled rotors

trezaei....when I saw the hole in my rotor...the first thought was "hey hey hey!! already on my way to getting drilled rotors...hoorayyyy!!"

SeaCoupe

I have no problem with resurfacing rotors. Just smooth braking.

I agree with the manufacturing defect. While I have not seen this before, I would get it replaced ASAP. You don't want to run the risk of cracking.

E

c230K415

Do you guys think I can really go in and say this is their fault...that it is defected and what not....plus...I think I would have to pay for one rotor as well...so that there is even rotors on both sides of the car...plus I am not sure if the rotors would be covered under my warranty...

yeuchau

just give it a try
u have nothing to lose right

whoover

It's worth a try, but another thing to keep in mind is the normal service life a rotor. Depending on how hard you use them, rotors need replacing at 25,000-50,000 miles. So even if the dealer accepts responsibility, after they prorate the miles you've gotten from them you might not be ahead very much.

c230K415

Alright...I'll give the dealership a try whenever I can and keep you guys updated just in case, and god forbid, you guys find yourselves in my scenario...thanks a lot for the tips!

rtking

There is virtually nothing you can do (under normal operations) to cause a hole in the rotor. I've heard of cracks (hard use of the brakes, usually with cross-drilled rotors) but not a hole. This, IMHO, is clearly a casting defect. Especially since this looks like the rear rotor (solid rotor). Probably the rotor was cast and there was a bubble in the metal as it was formed. I think it's undeniable that it's a defect and would have been scrapped as a defect had a QA person seen it.

Bob

slammedcclass

mine too hahahah

C230 Sport Coup

How much time and effort you want to spend fucing with this?
Buy a new rotor (or both) and slap it in, 10 minute job, and about 30-50 bucks.
Lesson learned. Don't resurface rotors.They warp.
Is it front or rear?

Don't resurface rotors.
It's not worth the hassle.

slammedcclass

that rotor is tryin to say u need holes get one with holes

c230K415

Geez, calm down a notch buddy. First of all, I never re-surfaced these rotors before. Second, It would be nice if I can squeeze 2 free rotors out of the dealer through warranty so I can sell them and at the same time purchased some slotted/drilled rotors. And it is Front.

aecasasus

Wow...I'd say it's time for new rotors.... Good Luck!!

SeaCoupe

Bob;

I disagree with you here. Rotors wear into the pads that have been used on them. This bedding process creates the fine lines that circle the rotor. When you resurface the rotors you get rid of this. Then you get a better bedding in of the new pads. As long as the rotor has enough metal on it, I prefer to get them resurfaced.

Resurfacing insures that I don't get brake wobble/steering wheel feedback during hard braking.

There are a number of procedures that MB recommends that I don't follow. Like changing oil. I always do it from the pan. I guess it is because I'm old school, but there are habits that I'm don't see a reason to change.

E