For the last couple of days my driver side headlamp has not been as bright as normal. Now the headlamp flashes when I first turn on the lights and then turns off entirely. The system tells me there is a headlight malfunction. Is the problem the headlamp or is it more likely something else? If it is the headlamp is it something difficult to replace on my own or would it be more prudent to take it to a shop? My headlights also have the feature where they move with the steering well. Does this matter? Thanks for your help!!