What am I looking at with these vacuum schematic drawings? I mean, I get it...I get it...all the parts are labeled, but are these things from a side view? Front?

There are two schematics in the stickies for the 123 - I'm looking at both, and I'm totally lost.

My vacuum system is totally erratic (i.e. locks work some times, car wont' turn off occasionally, heat only works through defrost and only comes on about once every 20 tries). I need to get, at a minimum, regularly working heat - it's getting cold in Michigan!

Have a hand vacuum pump (borrowed from friend - Craftsman), so another weekend learning as I go, I guess!

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1984 300D: 275,000 miles (soon to be for sale)

In search of my 1987 300D in anything but white.