I found these sites helpful.
www.mercedesdismantlers.com/722.3and722.416_transmission_adjustments.html
www.continentalimports.com/ser_ic20242.html
http://transmission.articles.mbz.org/adjust/
Also look through the DYI section.
I just started into this having recently aquired my first MB and find this site the best for guidence.

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1983 300SD
200000miles