Hi im a owner of a 07 focus st3 and in last week the reversing ligh has stoped working, iv changed the bulb and fuse and still no luck im wondering what it could be, and iv had the airbag light come up on my dash i want to know if it is a mot fail if its there, and finaly last question how do i go at it and change a side light bulb on the focus? Do i have to take the whole headlamp off?