I'm having a hard time finding info to service the a/c system (R12) in my 1991 BMW 535i. Specifically trying to find what pressures I need to be at, how much refrigerant is needed and so on. My Bentley service manual literally says to take the car to the dealer for a/c service and another service manual I found online briefly tells you how to use the dealer's machine but doesnt say what pressures you need to see or how much refrigerant to put in the system. I asked on the bimmerforums with no luck and have read every a/c related thread there is over there.

I'm hoping somebody with access to one of these databases can look up my car and see if theres any good info on the a/c system that they can share with me.

Thanks!

 

Here's a pressure map for Freeze-12

http://freeze-12.com/f-12presstemp.html