EdenGLK

Today when I got out of my GLK, I noticed something VERY off with my rims. My rims were SO full of brake dust so I decided to investigate even more. As I got closer and closer, I noticed a yellow colour that is very prevalent on the brake rotor. This is on ALL the brake rotors.
Heres some pictures :




Anyone have any clue as to what this is? I was thinking it might have been something I ran over, but I'm usually very persistent when it comes to dodging things like that / pot holes.

ratiu_john

Don't wory about it it's just a little bit of rust! The brake rotors are made of steel and in contact with water they do rust a little bit but it cames back to normal whem you drive and use the breaks a couple of times. You'll notice that when it;s sunny outside and there's no water contact the brake rotors have a pollished silver look.

NYCGLK

^^^what he said. Look at any car standing outside for a few days after rain, you'll see rusty rotors.

EdenGLK

Ahh yeah cause these last couple days its been raining hardcore. I noticed when I moved the car into the garage, it totally disppeared, probably from pressing the brake :

MBRedux

QSHIP

aAll rotors happened to be like this when got in contact with moisture or water.No exception, drive it few miles and it should come off.