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Autopapyrus · Mercedes-Benz C-Class W203 (2nd generation)
https://autopapyrus.com/guides/mercedes-benz/c-class/rear-bumper-removal-and-installation/
Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.

Mercedes-Benz C-Class W203 (2nd generation): Rear Bumper Removal and Installation

The W203 rear bumper is held by bolts and nuts accessed from the trunk, in the wheel wells and along the lower edge. To reach them, you need to remove the trunk trim and the side pockets. Remove the bumper with a helper to protect the paint. If parking sensors are installed, disconnect the connector. The general procedure is the same for the sedan and the wagon, but the exact set of trunk trim pieces differs.

DifficultyMedium Time1.5-2.5 hours Steps12

Key figures

  • Fasteners under the taillightsthis is how many you need to remove after taking off the trunk trim (step 4); count them so nothing is forgotten
    4 nuts and 1 bolt on each side
  • Bolts on the lower edgeremoved from underneath the bumper (step 7)
    2 on each side

Check these values against the manufacturer’s specification for your vehicle before you start.

Parts

3
№PartAlternatives
01 Rear bumper assembly, painted to match bodywhen replacing
02 Fender liner clips and rivets AlternativesFischerHella
03 Bumper trim panelif damaged

Tools

7
  • socket set and ratchet with extension
  • Torx set
  • Phillips and flat-blade screwdrivers
  • plastic clip remover or thin flat-blade screwdriver
  • masking tape
  • soft padding
  • helper
There's a full repair manual for this car Every system, wiring diagrams and torque specs — not just this job. Haynes and 12 more. See manuals →

Step by step

12 steps
  1. Park the car on level ground, shut off the engine and turn the ignition off. You don't need to remove the wheels. Use a ratchet with an extension for work in the wheel wells. Apply masking tape to the fender edges next to the bumper to avoid scratching the paint.
  2. Open the trunk and lift the spare wheel well cover or the floor covering.
  3. Remove the plastic trim on the trunk sill and the side trim panels with pockets on both sides to gain access to the taillights and the fasteners below them. Pry the clips carefully, as some of them are single-use.
  4. Under the removed trim, below the taillights, find the bumper fasteners on each side: four nuts and one bolt per side. Remove them and put them in a separate container. The bumper reinforcement does not necessarily have to come off with the bumper if it stays on the body, and the procedure depends on the trim level. First look carefully at what exactly holds the reinforcement.
  5. In the wheel wells, remove the self-tapping screws and pry out the rivets that attach the fender liner to the bumper, then fold the liner back.
  6. Move the wheel well seals aside and remove the bolts that secure the bumper to the fender (one or two in each wheel well). Do not remove the screw that only presses the bumper against the body unless it is specified as a trim panel fastener. It is enough to loosen it.
  7. Remove two bolts on each side from the lower edge of the bumper.
  8. Check that no fasteners have been left behind: run your hand around the perimeter, especially at the edges by the taillights and in the wheel wells.
  9. With a helper, pull the bumper toward you and sideways to release the guides. Do not pull abruptly.
  10. If parking sensors are installed, disconnect the PDC connector and pull the wiring out of the rubber grommet in the body. Then set the bumper on soft padding.
  11. Installation is done in reverse order. First guide the bumper into the side guides, connect the PDC connector (check that the sensors work before final tightening of the fasteners), then install the bolts in the wheel wells and on the bottom, and the nuts under the taillights. Tighten moderately, without excessive force, so you don't strip the plastic: for bolts like these it is usually 8-10 N·m (6-7 lb-ft); check exact values against the manufacturer's specifications.
  12. Install the fender liners with new clips, then refit the trim panels, the sill trim and the spare wheel well cover. Check that the gaps between the bumper and the fenders and trunk lid are even.

Common mistakes and warnings

  • The torque values in this guide are approximate
  • Do not apply heavy force to plastic fasteners
  • The bumper is light but bulky: remove it with a helper
  • Before starting work, turn off the parking sensor system and do not pull on the wiring when removing the bumper