Still trying to sort out the car.
There is a leak in a fuel line at the Fuel Distributor. This line is supported on the fuel distributor, but does not connect to it. The line has a metal fitting and elbow at the RF corner of the fuel distributor, and then the rubber hose disappears under the intake manifold. The metal elbow end is leaking because someone ( evidently) tried to unscrew it without a backup wrench, and the twisted it to the point that fuel straps out.
I need to replace this hose, but I don't even know what it is called. Getting to the other end looks like I may have to remove the intake manifold. Is that correct?

I can find very generic Bosch CIS descriptions, but can't find anything specific to my SE to help me identify this part.

ALSO---I just found a loose component just lying in the air dust to the filter housing. It is connected to a wire, but not installed anywhere. I can try to post a picture, later, but wondering of anyone has any idea what it might be before I venture out to my cold garage.

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1982 300SD " Wotan" ..On the road as of Jan 8, 2007 with Historic Tags

More research, and I believe that line goes to the fuel cooler, and that I can by-pass it until I an sure that the engine and transmission are in good enough shape to save the car.
Picture of the kinked hose end:

Also 2 pictures of the "found" sensor" from different sides

Attached Thumbnails

     

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1982 300SD " Wotan" ..On the road as of Jan 8, 2007 with Historic Tags

It appears that my fuel injection pressure regulator is FUBAR. I have a local recycling yard with several candidate vehicles in it. Is there a quick "junkyard" test that I can perform on non-running engines to know if the pressure regulator is worth taking? Based on the system description, I wonder if you could depress the diaphragm thru the fuel inlet connection using a small diameter pin punch---or does such activity ruin the regulator.

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1982 300SD " Wotan" ..On the road as of Jan 8, 2007 with Historic Tags

yes that hose goes to the fuel-a/c heat exchanger and I believe that most euros don't have it.


also of note: this is a return line so it's not under pressure


the sensor you're showing is a intake air temperature sensor and it fits into a plastic hose that goes into the air cleaner

why not just get a hand-pumping vacuum pump (mityvac) and see if the diaphragm holds vacuum?

Exactly---I was thinking that might work. It was good to hear you suggest it.

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1982 300SD " Wotan" ..On the road as of Jan 8, 2007 with Historic Tags