I have a machine that I can't really figure out how to use. I can recover r12, but I cannot figure out how to "process" it so I can use it again. I have a 30lb tank of r12 in my basement. Must be about 10lbs in the tank on the machine. No instructions can be found online. I may just get rid of it.

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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