I just did my 91 560SEL last weekend. New front rotors,new bearings, new hoses and new pads installed. This was my first time to do this jod on a mercedes. although I have a 66 mustang that I have worked on for years.
I installed speedbleeders sometime ago. this allows me to bleed my breaks by myself.
The job is not hard, but quite messy.
Since I do not have the tool to measure bearing play, I just did it by feel and through readings from the posts ( thx to Sixto) and pindelski's procedure likewise. This is the only part of the process that I was not comfortable about.