Today rear brake pads were changed successfully. Very easy and takes max 1 hour for my first replacement in my BMW 530d Xdrive. In a few words I ditached EMF brake actuator by unscrewing two small torx bolts and remove it from caliper. Then you need turn counterclockwise splined hole until filling a stop. So, now caliper piston can be pushed back in by common tool. Installing pads, wear sensor (right side) and mount back this actuator. Finally you have to on and off parking brake to set EMF brake in working position. So, all work correct - Parking Brake and Auto Hold.
I will prepare detailed DIY with pictures and TIS sheets soon. Need find time. Sorry for English.