I have a Renault Megane and the milometer light is very faint. I read on a forum that there is a switch somewhere to turn this light brighter but cannot find either the switch or the relevent forum to check where to look for it on my car. Next to the milometer there is a button which presses in so that I can reset my mileage and there is another button on the opposite side which does not seem to do anything. All other lights on my dashboard are correctly lit. I have a Renault Megane 2.0.