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Home >> Mercedes Benz >> 2021 >> C300 Base, 2D Convertible >> Repair and Diagnosis >> Collision >> Body Panels >> Collision - Rear Wall & Rear End - 205 Chassis >> Testing & Repair >> Remove Longitudinal Member At Rear - Ar64.20-P-1200-22LW

Remove Longitudinal Member At Rear - Ar64.20-P-1200-22LW

Model 205.0/1/2/3 

IMPORTANT The following operation steps are shown on the left side of the vehicle on MODEL 205.0 and must be performed analogously on the right side in the event of damage.

G14187206Courtesy of MERCEDES-BENZ USA
  1. Expose spot welds on upper crossmember (3) and cut out (areas A).
  2. Expose impact spikes on upper crossmember (3) and cut out (areas B).
    G14187207Courtesy of MERCEDES-BENZ USA
  3. Heat upper crossmember (3) in crosshatched areas.
  4. Remove upper crossmember (3).

    IMPORTANT Crosshatched areas are bonded with adhesive.

  5. Mark separating point on lower crossmember (2) and cut (area C).

    NOTES Do not cut too deeply.

    Otherwise the components below can be damaged and weakened.

  6. Expose spot welds on lower crossmember (2) and cut out (areas D).
  7. Expose self-piercing riveting on lower crossmember (2) and drill with Ø 6 mm bit (areas E).
    G14187208Courtesy of MERCEDES-BENZ USA
  8. Heat lower crossmember (2) in crosshatched areas.

    IMPORTANT Crosshatched areas are bonded with adhesive.

  9. Remove lower crossmember (2).
    G14187209Courtesy of MERCEDES-BENZ USA
    G14187210Courtesy of MERCEDES-BENZ USA
  10. Expose spot welds on front striking plate (4) and cut out (area D1 ).
  11. Expose spot welds on front striking plate (1) and cut out (area D2 ).
  12. Expose spot welds on rear longitudinal member (1) and drill with Ø 6.5 mm bit (area E1 ).
    G14187211Courtesy of MERCEDES-BENZ USA
  13. Mark separating point on rear longitudinal member (1) and cut (area F).

    NOTES Do not cut too deeply.

    Otherwise the components below can be damaged and weakened.

  14. Expose concealed spot welds below cutout and drill with Ø 6.5 mm.
  15. Expose spot welds on rear longitudinal member (1) and cut out (areas G and H).

    IMPORTANT Cut out spot welds through two panel thicknesses (areas H).

  16. Expose spot welds on rear longitudinal member (1) and drill with Ø 6.5 mm (areas I).
    G14187212Courtesy of MERCEDES-BENZ USA
  17. Model 205.0/1/3

    Expose impact spikes in rear longitudinal member (1) and cut out (area J).

    G14187213Courtesy of MERCEDES-BENZ USA
  18. Mark separating point on rear longitudinal member (1) and cut (area K).

    NOTES Do not cut too deeply.

    Otherwise the components below can be damaged and weakened.

    IMPORTANTDimensions: 

    k = approx. 20 mm

    G14187214Courtesy of MERCEDES-BENZ USA
  19. Model 205.0/1/3

    Heat rear longitudinal member (1) in crosshatched areas.

    IMPORTANT Crosshatched areas are bonded with adhesive.

    G14187215Courtesy of MERCEDES-BENZ USA
  20. Heat rear longitudinal member (1) in crosshatched areas.

    IMPORTANT Crosshatched areas are bonded with adhesive.

    G14187216Courtesy of MERCEDES-BENZ USA
  21. Heat rear longitudinal member (1) in crosshatched areas.

    IMPORTANT Crosshatched areas are bonded with adhesive.

  22. Remove rear longitudinal member (1).

    IMPORTANT Helper required.

    G14187217Courtesy of MERCEDES-BENZ USA
  23. Sand down mating surfaces to bare metal in crosshatched areas.

    IMPORTANT Grind mating surfaces down to bare metal on inside (area N).

    Sand down spot weld flanges to bare metal on both sides.

  24. Remove grinding dust and drill chips.
  25. Coat insides of spot weld flanges with zinc dust paint.

    NOTES Do not coat bonding surfaces with zinc dust paint (areas M and N).

    Otherwise adhesion problems may occur.

    IMPORTANT Observe pretreatment of bonding surfaces.

    G14187218Courtesy of MERCEDES-BENZ USA
  26. Model 205.0/1/3

    Grind mating surfaces down to bare metal in crosshatched areas (areas P and Q).

  27. Sand down mating surfaces to bare metal in crosshatched areas.

    IMPORTANT Sand down spot weld flanges to bare metal on both sides.

  28. Remove grinding dust and drill chips.
  29. Coat insides of spot weld flanges with zinc dust paint.

    NOTES Do not coat bonding surfaces with zinc dust paint (areas 0 and P).

    Otherwise adhesion problems may occur.

    IMPORTANT Observe pretreatment of bonding surfaces.