Whoops, just found out ASTG is a transmission Tech Help hotline that is subscriber based catering to repair shops. Subscribers pay an annual fee and call in when they get into a jam and need to consult with someone.
Anyway, the select manuals are written by their technicians and cover only teardown and re-assembly.
So far the only booklets ($15 each) available for MB are for 722.34 and 722.5 transmissions. I have no idea which models these go into.
Their e-mail is firstname.lastname@example.org.