Depending on the year and configuration of the attachment locations can vary.
-open the hood.
-under the hood, Unscrew the three screws and remove the grille.
-behind the grille, Unscrew the four screws.
-take out the four piston and Unscrew the screws at the bottom.
-wrenched the wheel to the side.
-in the wheel wells, Unscrew the screws and peel the fender liner (front part).
-for wheel arch liners Unscrew two screws on each side holding the bumper corners to the wings.
-with the assistant pulls the bumper forward (look for wires).
-switched the hoses to the headlight washers (if any).
-release the connectors for fog lights and temperature sensor (if any).
-open the lid/liftgate.
-on the perimeter in the opening of the trunk, Unscrew the screws.
-Unscrew the screws and take out the rivets that attach the lower part.
-wheel arches take out the caps and removed the wheel arches (rear).
-we release the latch in the wings (pull the corners themselves).
-with the assistant pulls the bumper back from the rails in the wings (look for wires).
-snap together the connectors of the equipment (if any).
How to remove front and rear bumper Mercedes Vito V-Class W638
How to remove front and rear bumper Mercedes Vito/ Viano V-Class W447