Hi. Im new. I have a Bosch fridge freezer. Clasixx. On the light switch/temperature control, I have a small round button switch. Which way should the switch be? It is only a rocker switch and is about the size of a 5p piece. Down shows red , up hides the red. I have no manual, so am not sure what the switch does. I also assume the levels of temp 1 to 5 with 5 being the colder. Any help? Thanks