I can use any of the manuals listed below and will gladly pay or trade something, do you need anything for the 83 300d? I can send it with a ups label.
You might want to check the last one on the list below, sometimes I see the first 123's (which your 83 300d is) listed as starting in 76 although it was a 1977 model year car and if so the most of the descriptions will work although your car is a turbo and the early 300's were natural.
Thanks,
Brian

· Maintenance manual / passenger cars / USA version220D through 600 including year 1977
· Service manual / Maintenance , Tuning, and Unit Replacement / Passenger cars starting August 1959 * if this includes anything from 1972-85 in a 220,240,250,280 or 300.*
· Passenger cars starting 1968 / Series 114 115 / Body and Chassis
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· Service manual / Engines M115
· Model Year 1976 / passenger cars / USA version

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Ncnetman
1959 Chev 3100 Fleetside
1965 Mustang
1968 Torino GT fastback
1969 Ranchero
1974 240d 4-speed -for sale
1976 240d fresh paint- on hold
1978 300cd fresh paint and new rearwindshield rubber
1990 6.2 Suburban 194k-getting a 6.5 turbo
2008 Duramax Silverado
2015 VW Passat TDI