Hello ryan,
Mercedes-Benz published a manual for this unit. It was titled "Automatic Transmission with Two Planetary Gear Sets, assembly service and repair" (passenger car models 190C through300SEL).
The contents of this manual can also be found in the "Workshop Manual, Passenger Cars as of 1959). You will probably have to go the CD rout unless you find a used one.
Joe Alexander
Blacklick, Ohio