peoples2

do i have to do anything ( like depress the cylinder or let fluid out )before i knock out the pins and take off the brake pads.

s5benzo

the pins are knocked out first, then in order to get the new brake pads in you have to depress the caliper piston , or the new pad wont slide in . i depressed my pistons in without removing the calipers . if this is something you dont feel comfortable with have a shop do the brakes for you.

peoples2

what do you use to depress the brakes.and do i need to release any brake fluid before i depress the piston.

ohlord

pry pad a bit with a screw driver from the side
then push out the pin or pins with a drift punch or long nail pins push in towards the car
remove metal springs
pull pads
take a large c-clamp and push the pistons flush with the calipers making sure to keep the boot proper.
apply pad paste to back of pads
wait 10 minutes
replace brake sensor on the pass side
repeat other side make sure the fluid doesn't overflow the res if it gets to high siphon some out with a turkey baster
when done both sides check all your work torque rims to 80ft lb
apply brakes
check fluid level put cap back on
take slow drive apply brakes
bed pads in according to pad specific procedures
or generic if not supplied

P ONE

Also, check out fkong's post on the W220 section. Brake Job Instructions
I just changed my rears today and it was by far the simplest brake pad replacement I have ever done.

ohlord

you said front brakes.
no pins
pry back pads
remove caliper bolts inside the rubber capped recesses
slide caliper out of the way r/r pads
follow diy