A Merc friend driving a 124 was looking over my shoulder as I changed the REAR pads and rotors on my car.
When I was fitting the new pads, he advised me to sand the pads first to avoid any squealing (???).
Not wanting to offend him
, I did it and amazingly, the new brakes do not squeak at all!
Btw, my setup in the rear is BREMBO rotors/Texstar pads.
Originally, they were the same as the front ATE rotors/Jurid pads.
In any case, no squeals from either setup.