Torn vacuum diaphragm is irrelevant to no heat, you should still be getting heat regardless of whether or not 1 or all diaphragms are thrashed. Go check the hose going to the driver side firewall and see if the heater core is bypassed or doesn't have some sort of valve added on to prevent coolant from going to the core. As for the AC, don't touch anything. You confirmed that the compressor turned on which means as of now all the electrical components and the refrigerant are for the most part within spec. Trying to adjust anything there could cause it not to turn on. Right now, you're just not getting cold air flow which could be the blend air flap. or some other issue unless the refrigerant is at the bare minimum to turn the compressor on, but not enough to cool the cabin.

As a side note for the torn pods, unless you're a purist, if you can't find those pods, then check other models and just mount them up. I think I snagged a few from a 124 and a 210 and mounted them up to my 201. If you can, reuse the metal legs, or you may need to do minor fabrication for the desired length. I also ditched the w201 bulky dual switchover valves for the 124. Much simpler and sturdier. Just wired everything according to the 124 controls by rearranging the pins in the connectors and plugged up the proper vac lines to the valve and that was it.

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1990 190E 3.0L