I'm transplanting an '87 2.5 Turbo engine into an '86 300E on behalf of a friend. I have done a very similar swap into a 190E in the past, so the project isn't totally unfamiliar to me.

However, when I did the 190, I transplanted the whole wiring harness from a diesel car to a gasser. I don't have that luxury/curse with the 300E.

In this case, I want to get by with the bare minimum in order to get the car functional and driving under its own power. To that end, I'm trying to figure out the minimum number of electrical and vacuum connections that I can use in order to still result in a running car. Here's what I have come up with so far.

1. Starter motor electrical connections
2. Oil pressure and water temp sensors
3. Alternator wiring
4. Vacuum source to brake booster
5. AlDA vacuum source
6. "Flying Saucer" vacuum amplifier for transmission vacuum source
7. Vacuum shutoff to IP

Can anyone else list items which would be necessary for engine operation? (apart from fuel supply and return lines)?

Thanks,

SteveM.

__________________
'93 190E/D 2.5 Turbodiesel 5-speed (daily driver)
'87 190D 2.5 Turbo rustbucket - parts car
'84 Dodge Rampage diesel - Land Speed Record Holder
'13 Ram 2500 Diesel
'05 Toyota 4Runner