One reason to open the brake bleeder on newer cars when pushing pistons back in: Otherwise you may send crud that was in the caliper back up the line into the ABS unit. And you can bet it is a lot more expensive to replace!

Brakes
 

1984 300d Turbo
Buy The New Oil Or Trans Fluid Also Brake Fluid At Pep Boys Take The Old Fluid To Pep Boys They Service Brakes,trans And Oil

I don't worry about opening the bleeder screw before retracting the pistons on my own cars for the simple reason that I religiously and thoroughly flush my brakes at least annually.

If I had a dirty system, I would THOROUGHLY flush the brakes prior to changing the pads and then leave the reservoir level low for the retraction process, then top off afterwards.

Good luck,

Where can this "bleeder" be purchased? At any auto part store?

Can someone give me some details on changing out these pads?

I am confused. :silly:

Thanks!