Mercedes-Benz Cars 2000-05

Fuel Rail (Supply Manifold) & Injectors

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove the air intake hose and air filter assembly.
  6.  
  7. Remove the screw securing the fuel rail plastic cover, then remove the cover.
  8.  
  9. If equipped, release any residual pressure in the fuel rail using the service valve on the end of the rail.
  10.  
  11. Detach the fuel feed line and separate the electrical connections from the injectors.
  12.  
  13. Remove the bolt(s) securing the fuel rail, then carefully pull it up and out of the intake manifold.
  14.  
  15. If necessary to remove the injectors, remove the retaining lock then pull the injector out of the fuel rail.
  16.  
  17. Installation is the reverse of removal. Use new O-rings for the injectors and coat them lightly with oil.

    Click image to see an enlarged view

    Fig. Fuel rail and injectors used on the M271 engine; M111 similar



    Click image to see an enlarged view

    Fig. Exploded view of the fuel rail-M112 and M113 engines



    Click image to see an enlarged view

    Fig. Be sure to engage the square catch (arrow) in the retaining lock

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