W123 OM648 Project - PeachParts Mercedes-Benz Forum

BirthdayBenz · #13 03-19-2022, 08:16 AM

I've been planning and running new electrical things.

I ran the positive battery cable salvaged from the W211 from the trunk. I ended up doing this twice. First I went up over the rear fender following the vacuum lines but then when I made it to the firewall I wasn't happy with the length. I removed the cable and re routed it by drilling a hole next to the passenger side strut. It now routes around the fuel tank and I've got an extra 2ft or so of cable to work with.

Bonus! I found an old mouse nest behind the fuel tank and vacuumed that out.

I used the power distribution block from the W211. Mounting it in the passenger kick panel. I've still got some reinforcement/better mounting to do as the angels in the W123 floor area are not the same as the W211. Nothing is fully bolted down in the final position in any of these photos.

The red cable on the distribution block is wired to the W123 main power wires that were originally directly connected to the battery. This will provide power to all the original systems in the vehicle.

Engine side of firewall

ECU Mounting:
The ECU will be mounted on the old battery tray. I found and modified a waterproof camera case.

Engine photo for no reason. That turbo looks large...

I ordered the wrong throwout bearing and wrong clutch alignment tool. So I need to find the correct ones and reorder. This is why the engine is still on the stand and not assembled to the transmission.