Originally Posted by BillGrissom

I had that black torpedo housing in my 1985 CA 300D. Since I installed an earlier engine w/o the IP rack position sensor, the car-side wires are just hanging. Indeed, I was recently pondering what they used to go to. If I recall, you pop open the torpedo and will see small individual spade connectors. The rack sensor applies to 1984 & 1985 U.S. models. It is only for the EGR controls.

Unlikely your EGR stuff is still working, and the engine will run fine w/o it. You can find a diagram here of all EGR components you might remove, will about half the number of under-hood vacuum devices and tubes. You can also buy EGR block-off plates to remove the valve (~$20 Rollguy here). That will make getting at the alternator bolts much easier. If you also re-route the high-pressure AC hose, like me, it will only mildly frustrate you when loosening the alternator. But, insure no EPA drones are watching you.

The metal clip is still on my injector tubes. I recall the intake manifold pressure-sense tube is secured by it, though the tube always pops out of the clip so doesn't help much and "isn't needed".

While discarding junk, don't forget the useless "aux water pump" which can leak coolant and cause your dash to catch fire.