When changing the rear rotors, you do not need to remove the caliper carrier (the part that holds the caliber against the rotor, and is bolted to the rear suspension with 13mm bolts...a very awkward thing to remove). The rotors can slide out once loosened without removing this carrier. This is different from the fronts, where you do need to remove the carrier.

I couldn't find this on NAM when I was preparing to change my rear rotors, and found that the Bentley Manual is actually is inaccurate.

BTW, compressing the rear piston is a B#$%H, even with the special tool from Harbor Freight.

I hope this saves somebody a step if they attempt this job!