I have an e320 1999 light bulb warning light, I checked all the bulbs and they seem to work fine. could it be the wrong voltage for bulbs. it was at a dealership so I was pretty sure they had the right bulbs installed. when i turn the first click to fog that is when the warning light goes on. also is there a module to replace or if this isn't fixable, is there a plug behind the guages that i can pull that operates all the warnings so i can see my normal dash again? thanks