This means that originally:
(a) your chassis was a W123.133,
(b) your engine was a 617.952 I5, and
(c) and your model was as stated, a 1982 300D, Turbodiesel

This means that regardless of whether it is a Federal or California car, I believe your vacuum diagram can be found at: http://www.peterschmid.com/vacuum/1977_1985/617_95/1981_1984.jpg
Take a look at this and check around the engine compartment to see that the vacuum plumbing is according the diagram and in fact you have the same components that are shown. Yes, count your blessings you do NOT have a 1985 Calif. car!!! I note that you have somehow disabled the EGR... probably by disconnecting and plugging/capping off the lines. Unless your State has an active inspection program, I would leave the EGR disabled.

I see that you already have the mandatory hand vacuum pump.

So this is how I recommend you do a basic/easy check of your VCV.
(1) With the engine shut down and the throttle closed, hook the vacuum directly to the top of the VCV by disconnecting the green dashpot/surge damper [shown as #72 in diagram].
(2) Pump the hand vacuum pump to see if the VCV hold any vacuume at all. Report back to this THREAD.
Regards,