Here's pictures of my front brakes after 1 track day.

 

C63 brakes are EXTREMELY good. This has been discussed ad nauseum. They were some of the best brakes to be fitted to a car back when they came out, outbraking both GT-R and Z06 in some independent tests.

You're clearly using the wrong brake pad for track use. It's not brake error, it's operator error.

There are tons of threads on here about what pads work well on track if you do a search.

 

Those are images of an over heated pad...

 

Exactly

 

That was exactly what I was about to say. The pads that Mercedes-AMG install on these cars aren't I repeat are not race pads. These are pads made for everyday use. There are pads that are made for track use only. That will hold up to the heat and abuse better then factory pads.

 

I was just showing what will happen with the oem pads haha

 

Tracks on street pads and blames it on the brakes.

 

Looks like your pads are in need of replacing.

 

I remember my brakes looking VERY similar the first time I ever went to the track lol. I think I might still have the picture of them on my Facebook or Photobucket or something. I believe I was using ****ty Autozone pads at the time... Get yourself some ACTUAL track pads and you shouldn't have that problem again

 

Porterfield or Endless. Kthxbye

 

Those are just brands with many different compound choices. Just sayin'

 

Pooched rotors too it would seem. Tires shot too?
At least it looks like you have the solid rotors so a cheaper fix. It could be worse with the Performance package brakes at $800+ per rotor.
So how was the day on track other than expensive?

 

I ran Endles ME20 pads on my previous car for the track.
Which endless pads would you guys recommend for the C63.

 

I Ran the Endless ME20's for a bit, awesome pad and great for track use... I made the mistake of driving on them for a week after the track day. Not so nice for the street, super squeaky.

 

I ran them on the street as well. They do squeak a lot.
I can live with the squeaking, I just turn the radio up.
It's a mission if you have to change pads before and after a track day.

 

Endless MX-72 is a great compromise for a daily driveable pad that you can track.

Endless MX-72
SS Brake Lines
Castrol SRF/Motul RBF Brake Fluid
GIRODISC Rotors

Probably the best setup you're going to get on a C63, without going full BBK.

I'd add in the fact you could do RacingBrake SS Calipers if you really want too.