just note, the wear indicator is an approximation. CCB rotor materials "burn off" rather than wear down like steel brakes. (they also wear down, but not as much)
The true way to measure the rotor wear is with a carbotech tool or to weigh each rotor and compare it to the start of life number stamped on each rotor. (each rotor has different weights at start of life due to the way the rotors are made).
More on it here:
https://f80.bimmerpost.com/forums/sh....php?t=1239580
