new rotors and pads on 89 300ce
 

im replacing my front rotors with cross drilled and slotted ,along with ceramic pads,i was reading they recomend you replace the brake pad wear indicator while doing a brake job, does anyone know if this is absolutley nessasary? or can i reuse the old ones,im sure there cheap enough if i need to replace them,also are these metric bolts or is there a special torqx bit to remove the caliper bracket? any ideas would be great thanks guys.marc