hi guy and gals help required, my 2012 altea xl has light bulb displayed on dash I have checked all bulbs and they seem ok, this light comes on after starting the car when I press the brake pedal, brake lights work fine but the high level brake light works but looks to me as if one light on the end does not illuminate and the one next to it flickers, questions are would this put light on dash, if so are the bulbs replaceable.