How do you drain fuel from a Volvo 850?

To drain fuel from a Volvo 850, first ensure the vehicle is off and cool. Locate the fuel pump relay in the fuse box and remove it to disable the fuel pump. Start the engine and let it run until it stalls, which will indicate the fuel is depleted from the system. Finally, disconnect the fuel line at the fuel rail or use a siphon pump to remove any remaining fuel from the tank through the filler neck. Always follow safety precautions when handling fuel.