Here is some more stuff:

https://s3.amazonaws.com/sspublicweb/mercedes/Mercedes+116+Climate+Control+Service+Manual.pdf

https://s3.amazonaws.com/sspublicweb/mercedes/83-604+climate+vacuum+diagrams.pdf

https://s3.amazonaws.com/sspublicweb/mercedes/w116-vacuum-climate.png


Thanks to sshanky for the info!

__________________
My occupational hazard bein'
my occupation's just not around...
1980 300SD
1980 300SD