No idea.
If it helps, you seem to be doing ok.
We replaced our front discs and pads and rear pads at 42,000km, not miles.
Told I did really well, told rear discs have around another 5 to 8000km left in them, then they will fit new rear discs.
Brake wear much heavier in GLC, I put it down to using adaptive cruise control all the time.
Let us know how you go with rear pads and discs.
Good luck.
If it helps, you seem to be doing ok.
We replaced our front discs and pads and rear pads at 42,000km, not miles.
Told I did really well, told rear discs have around another 5 to 8000km left in them, then they will fit new rear discs.
Brake wear much heavier in GLC, I put it down to using adaptive cruise control all the time.
Let us know how you go with rear pads and discs.
Good luck.