Ceramic Brakes RS6

[Sharrison14]

Looking at buying an RS6 with ceramic brakes fitted. On close inspection, the discs appear to have loads of hairline cracks on them....? Is this standard or signs of a problem?

Never had ceramics on anything before so they are new to me.

Thanks in advance.

 

[daytonamart]

I think this is fairly standard, the key for wear is the dot marker on the face. See a pic of mine with the circle in the top left of the disc.