Depending on the year and configuration of the attachment locations can vary.
Front bumper
-open the hood.
-under the hood, Unscrew the screws (spun down) that secure the upper part.
-the edges of the lower grille and pull out the plug (hold on clips).
-for plugs Unscrew one nut on each side.
-wrenched the wheel to the side.
-wheel arches take out the caps, Unscrew the screws from the bottom and removed the fender liner (front part).
-attach the fender liner to the side and Unscrew the screws (spun upwards) holding the corners of the bumper to the wings.
-remove holders that attach the bumper and the wing (pull toward the engine and yourself).
-with the assistant pulls the bumper (look for wires).
-release the connectors on the Parking sensors, fog lights, temperature sensor (if any).
Rear bumper
-open the trunk lid.
-in the trunk and remove the rear side trim.
-the side casings, in the inner part of the wings, Unscrew two screws on each side.
-for covering the back panel, through the holes, Unscrew the two nuts.
-perimeter Unscrew the screws (spun upwards) from the bottom.
-in the wheel wells, Unscrew the screws and peel the fender liner (rear part).
-move the wing flaps to the side and Unscrew one screw on each side (spun upwards) holding the corners of the bumper to the wings.
-with the assistant pulls the bumper backwards (look for wires).
-snap together the connectors of electrical equipment.
How to remove front and rear bumper Mercedes SL R231