After talking to colechelle I wish to withdraw the comment I made on pulling out the SBC plug to do the change of pads.
Though pulling out the plug is part of an MB traing program it should not be done at home.
I am the first one to normally say disconnect the battery before unplugging any ECU.
Please when changing the Pads just disconnect the battery, batteries in the case of an early 211, and all is safe
Thank you.