Where do I add Freon on a 2911 3 series BMW?

To add Freon to a 2011 BMW 3 Series, locate the low-pressure service port on the air conditioning system. This port is typically found near the accumulator, which is usually on the driver's side of the engine bay. Remove the cap from the low-pressure port and connect the refrigerant canister with the appropriate adapter. Make sure to follow the manufacturer's guidelines and safety precautions when adding Freon.