I just did the my rear brakes, easy peasy, used Bosch BC2200 pads, no scanner needed, no power source with jumper wires needed, just a 5mm allen wrench and T45 torx bit. The caliper bolts are 14mm.
Once the caliper is removed, use the 5mm allen wrench to remove the two electric parking brake motor bolts, separate the motor from the caliper, I did unplug the motors.
Now insert the Torx T45 into the rear of the caliper and turn (by hand) until it stops, put a block of wood in the caliper just in case you turn the internal screw the wrong way so it doesnt push the caliper piston out of the caliper, then back it off just a bit to keep some freeplay in the mechanism, you have just retracted the internal screw mechanism, now push the caliper piston in like you would any other, reinstall electric parking brake motor back onto the caliper, Install new brakes, reinstall caliper.
Wheels are back on, pump the brakes first to hydraulically push the caliper pistons out, then apply the electric parking brakes, you will hear the electric motors run for a little bit longer to pick up the gap from winding them back in with the torx T45, engage and disengage the electric parking brakes several times, you are ready to road test.