Cor bloody heck you don't ask for much do you?
I can't find the FSM chapter for the W201 but I can help with the W126 data
http://www.startekinfo.com/StarTek/outside/12253/program/Chassis/32-250.pdf
^ this contains the data you want for specific part numbers
http://www.startekinfo.com/StarTek/outside/12253/program/Chassis/32-010.pdf
Shows you what was fitted where so work backwards chap!
I'll keep looking for the W201 data - I think it is mentioned in the W124 FSM (just in case you know where to look for that...)
Same chapter number but different FSM gives it for different vehicles...
...are you sure you don't want the W123? That's an easy one...