I think the procedure for replacement has been covered several times, at least once by Larry Bible. Try your search again, but try refining the parameters. Unfortunately I don't know anything about the M103's.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.