How do you add freon to a Volvo 1997 850 T5?

To add Freon to a 1997 Volvo 850 T5, first locate the low-pressure service port, usually found on the larger of the two refrigerant lines connected to the AC system. Ensure the engine is running and the AC is set to the maximum cool setting. Attach the refrigerant can to the low-pressure port, then slowly release the Freon while monitoring the pressure gauge on the canister to avoid overfilling. Always wear safety gear and consider having a professional check the system for leaks or issues if you're unsure.