300E throwing axle grease

My 88 300E is throwing differential axle lube. I'm planning to remove the differential in order to replace the differential sub-frame bushings
and thought that while it was out we should replace the left and right differential grease seals. Do the flanges pop out of the differential with a large screwdriver used as a fulcrum to thrust them out like other automobiles? Also, once popped do the seals simply flat press into position? Thanks for your help JB 88 300E 99 E55
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