You will probably have to remove the caliper -- two bolts on the back. Usually requires a breaker bar, 18" or longer, they are a bit stiff.

Rotors, unless changed markedly from the W124, will usually just fall off when you have the 6mm retainer screw out and tap around the edge. May not clear the bearing cap with the caliper on, I don't remember.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!