Depending on the year of release of attachment is different.
-open the hood.
-Unscrew three screws on each side and remove the headlights.
-Unscrew the six screws that secure the top.
-on the perimeter in the bottom part Unscrew nine screws.
-(if any) in the wheel arches Unscrew one screw on each side (spun upwards) holding the corners of the bumper to the wings.
-assistant free the bumper from the clips in the wings and pulls gently on yourself.
-remove connectors from electrical equipment.