How to change the headlight on a 2004 bmw 5 series

If you have an entire headlight assembly (in case of accident) remove bumper, there are 8mm screws on the inner lining of the fron wheel well where the fender plastics and the air dam connect to the bumper, undo the screws concerning the bumper on bot sides of the car. then remove the plastic cover under the bumper (either philips screw heads or 10mm) and then under the aluminum re-enforcement strip behind the bumper (access from under the car) remove the torx screws that hold the bumper aluminum to the car frame, get a friend to help you pull the bumper off evenly an then seek the 8mm screws that hold the headlamp in place. the headlamp comes off the car strait out the direction of the front. disconnect the wires and connect the new lamp and fasten to the car. then do the assempbly in reverse order for the bumper installation.
for just changing the bulb, there are some rubber seals behind the light where the bulb rests. there are metal clips than you depress to release the bulb. install a new bulb and then replace the rubber caps.