Thanks for all the replies. I am trying to minimize the complexity of the engine in any way I can. Can I ask a couple more sensor questions in this thread?

I'll post some pics to make it easier. Decribing them is a little tough. I should probably add, that this engine is being mated to a Toyota manual transmission in a base model truck, so I'm trying to get rid of all auto-trans related items no longer needed. Every sensor, vacuum line, switch, linkage, etc. that isn't required is going to go. I went thru the Haynes manual, and can't find the answers on my own.

I hope I don't offend the Mercedes purists with this swap. There was nothing left of the 1983 300TD when I bought the engine, so no car was sacrificed for this project. It was rusted away, and hit in the rear.

Pics soon (if you're still willing to help me)

Roy