How much refrigerant should be added to the BMW 520 air conditioning system?

[JuneFitz]

BMW 520 air conditioning system requires approximately 4 to 5 cans of refrigerant for a single refill. Preparation: Before adding refrigerant, you need to prepare tools and materials such as an automotive refrigerant recovery and charging machine, refrigerant (most car air conditioning systems currently use R-134a refrigerant, and different refrigerants must not be mixed). Connecting the pipelines: Connect the pipelines of the automotive refrigerant recovery and charging machine to the high and low pressure pipes of the car's air conditioning system (red connects to the high-pressure pipe, blue connects to the low-pressure pipe). Vacuuming: After ensuring the pipelines are correctly connected and the refrigerant recovery and charging machine has completed its self-check upon startup, you can begin the vacuuming process for the car's air conditioning system. Adding refrigerant: Only after the vacuuming process is completed can you start adding refrigerant. Based on the maximum refrigerant capacity marked on the vehicle's air conditioning system, set the charging capacity, time, and type on the refrigerant recovery and charging machine. Once confirmed, the machine will automatically begin adding the refrigerant.