needed: 450SL engine wiring diagram

Anyone have any ideas where I can obtain a more extensive engine wiring diagram? I have the "Electrical Troubleshooting Manual" that came as part of the MBZ Service Manual CD from thepartsbin but it mostly covers the wiring inside the passenger compartment and only a few engine components. I need to replace just about every wire in the engine compartment due to cracks and wear and I want to avoid the $3,800 cost of a whole new harness. There are also several "after market" adds from the previos owner I'd like to remove but I need to know which wires are supposed to be there and which aren't.

Also I need some of the connectors, specifically the fuel injector connector (purple circle) and 4 terminal connector (blue oval). I would like to fix the connections right, not with excessive red electrical tape like they are now. Any ideas are welcomed.

Thanks