mrkozzy,here are two infrmative threads,if you intend to change the disks or bearings:
How To Replace Front Rotor W123

http://www.peachparts.com/Wikka/W123FrontPadsRotors
..athought it`s w123 described(different calipers,pads,rotors),the setup is basically the same.

W109,108,110,111,113,114,115 used these calipers:


-you just have to remove the splash plate,if fitted,knock out the retaining pins,remove the spring plate,pull the pads.Loosen the bleed screw,and push back the pistons with whatever you find appropriate...Good opporunuity to flush the system.I wouldn`t use the factory jack ...I`d renew the brake hoses also,if >7 years old...