I have engine wiring harness, and all brains. What I don't have is the controller-to-chassis wiring harness, over-voltage protection relay, etc.
What else do I need, and how can I integrate into the 1988 W124 300TE?
Should I just order the controller-to-chassis wiring and work from there?
Do I need to get the fuel-pump assembly for the C36/M104, or get will the fuel-pump assembly for my M103 work?