LMR - The DMBS was to diagram 556 (same as the 3-car sets) and the DTCL to diagram 585:
ER - These had the DMBS to diagram 557 and the DTCL to diagram 581:
Single Engine Conversion
3-car diagrams & Works Pics
2-car diagrams & Drivers Instructions
4-car diagrams & Works Pics
Details about preserved Class 104s can be found here.
Many thanks to Kevin Dowd for his assistance in the preparation of these pages.