I replaced some rubber vac lines in my TD and did some leak testing. I found that the plastic(maybe brown) vac line running to the hvac from vac supply did not hold vac... so I unplugged it and plugged the supply line. I did the same with the door lock lines. The good news is I got the turbo to work. The bad news is now all I have is HOT air coming from the vents. A/C does not work but this is very heated hot air. Does the lack of vacuum cause the air to blow full hot?

Thanks

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08 R320 CDI current

Past
95 E420
87 300D Turbo 5spd
90 300TE
83 300SD
85 300TD
92 400E
85 190D

I dont know the answer to your question but i would be interested in knowing what happens here.

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W123 1985 300TD naturally aspirated