Replacing the rear brake calipers on W126 W123 W124 - includes tools needs and venting the brakes

New feature is that I have turned on the CC automatic close captioning for folks who would like to follow the video along what I say in text form.
This video is about replacing the rear brake calipers on W126 W123 W124. The rear calipers pistons are prone to seizing up on you from time to time. The farther out they are due to pad wear, the greater the chance for them to do that.
Also covered here are the tools needed to get this job done and the two different brands of calipers used on these old Benzes (Bendix and ATE). There is also a tip about preparing the refurbished calipers for mounting. Finally I am covering how to bleed the rear brakes after the new calipers and pads are installed.
Recommended tools:
V shaped vice grips, for instance these: https://tinyurl.com/dqxoys68
Flare nut wrench set: https://tinyurl.com/2qsvfqpd
Brake bleed set: https://tinyurl.com/l69he77j