2004 Volkswagen Jetta running hot

I can't remember but I will find out if there is a bleeder on your vehicle, but to play it safe I want you to check the radiator for a screw (it will be a plastic) and the thermostat housing (it will be out of brass) see if there is a screw that you can loosen to remove the air. You need to be more specific with me, I am not a psychic mechanic, tell me if you been adding coolant? If there is a leak? And how all of a sudden it started to get hot? You're not telling me the whole story.