Partially Remove Rear Longitudinal Member - Ar64.20-P-1260-01FR

Model 257 

The following operation steps are shown on the left side of the vehicle. In case of damage on the right side of the vehicle, these steps must be performed similarly.

Observe the higher-level service document as well as the safety information in the service document.

1. Mark separating point on crossmember above rear axle at top and cut (area A).

   Do not cut too deeply. Otherwise the components below can be damaged and weakened.

2. Expose spot welds on rear-end floor (1) and cut out (area B).
3. Expose impact spikes on rear-end floor (1) and cut out (areas C).
4. Expose self-piercing riveting on rear-end floor (1) and drill out with Ø 6 mm bit (D areas).

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5. Expose self-piercing riveting on rear-end floor (1) and drill out with Ø 6 mm bit (L areas).

   Only on repair on right side of vehicle.

6. Expose self-piercing riveting on rear-end floor (1) and cut out (K areas).

   Only on repair on right side of vehicle.

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7. Expose spot weld on rear-end floor (1) and cut out (area E).
8. Expose impact spikes on rear longitudinal member (2) and cut out (area F).
9. Expose self-piercing riveting on rear longitudinal member (2) and drill out with Ø 6 mm bit (G area).

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10. Heat rear-end floor (1) in cross-hatched areas.

    Cross-hatched areas are bonded with adhesive.

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11. Heat rear-end floor (1) in cross-hatched areas.

    Only on repair on right side of vehicle.

    Cross-hatched areas are bonded with adhesive.

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12. Heat rear longitudinal member (2) in crosshatched areas.

    Cross-hatched areas are bonded with adhesive.

13. Remove rear-end floor (1) with rear longitudinal member (2).

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14. Sand down mating surfaces to bare metal in cross-hatched areas.

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

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

    Do not coat bonding surfaces with zinc dust paint (areas H).

    Otherwise adhesion problems may occur.

    Observe pretreatment of bonding surfaces.

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17. Sand down mating surfaces to bare metal in cross-hatched areas.

    Only on repair on right side of vehicle.

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18. Sand down mating surfaces to bare metal in cross-hatched areas.

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

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

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

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

    Otherwise adhesion problems may occur.

    Observe pretreatment of bonding surfaces.

    Courtesy of MERCEDES-BENZ USA