Hello,
I would like some help, concerning the vacuum system of a 1989 w124 300 turbodiesel.

Its like this: I put a OM603turbo in my 1986 w201 2.3-16valve gasser.
The engine already starts and runs, but at the moment i am connecting the vacuum system.
The folwoing i have found out:
-the vacuum pot on the InjPump that shuts the engine of
-the electric red thing at the end of the IP, which PROBABLY is enrichment at cold starts (sort of a choke, lets the engine rev a bit higher stationary)
-the ALDA thing (What exactly is ALDA? Is it enrichment for when there is turboboost available? more cc diesel injected? That way more power?)

But now my question: on the SIDE of the IP, there is bolted on a cornery thing, with some vacuumhose-attachements on it. The cornery thing is about the size of a pack of cigarettes, and it has a date (of manufactury?) stamped into it. On this engine (which came out of a 1989 car) the date on the part is 1994, and the part number begins with 140 (90's S-class)


Another question: On the drivers side fender there is a BLUE vacuum pot mounted, which is connected with some hoses to the engine, and also nearby (and connected to the ALDA, and the blue pot) a electric solenoid, with vacuum hoses and a 2-wire plug.
What are these for?

NOTE: this is a European car, so no exhaust stuff like trap oxidizers or other environmental stuff.

PLEASE your help!!