I think that drawing is not the right one; it shows an EGR valve, which the 116 does not have. It's hard finding a diagram; I believe it's on a site some have used ... peter schmid?? - I had trouble with that site. I'll try to upload something, but I may have to pm it to you. If you need something on the door lock vacuum, I have some pictures posted on this forum.
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'85 300TD W123
'83 300D W123, Daughter's
'80 300SD W116
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