I've changed the roof, boot and courtesy lights in my car's interior for LEDs but I forgot to replace the sun visor lights too. Does anyone know what bulbs they are? Also, should I have light that shows what gear I'm in (it's an auto) by the gear selector? Or does it just use the dash lights only to tell you what gear you're in? Oh, and are the steering wheel controls meant to be illuminated when the headlights are on? Because mine aren't! Thanks.