The blower speed, temperature, and vent selection knobs in the center console do not light up. I removed the knob from one but couldnt figure out how to get the bulb out. I don't want to break it. Does anyone know how to remove them: is it a simple pull or do you have to twist it or something? Also, do each of the knobs have a seperate light? It looks like they do to me but i want to make sure.