How do you top up air con on grand scenic?

To top up the air conditioning on a Renault Grand Scenic, locate the low-pressure service port, which is typically found on the larger diameter AC line. Use a compatible R134a refrigerant can and a pressure gauge. Attach the can to the service port, start the engine, turn on the AC to maximum, and gradually add refrigerant while monitoring the pressure to ensure it stays within the recommended range. Always consult the vehicle's manual for specific instructions and safety precautions.