Precautions for Air Conditioning
WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.
Use an approved refrigerant recovery unit any time the air conditioning system must be discharged. Refer to HVAC articles for "HFC-134a (R-134a) Service Procedure", "REFRIGERANT LINES" for specific instructions.