Rear Longitudinal Member Section Installation - Ar64.20-P-1260-03MFF

Model 177.0 

with code U54 (Compound-link axle) 

except code U55 (Multi-link axle) 

Model 177.1/9 

with code U54 (Compound-link axle) 

except code U55 (Multi-link axle) 

Model 247.0/6/7 

with code U54 (Compound-link axle) 

except code U55 (Multi-link axle) 

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 analogously.

The higher-level service document as well as the safety information in the service document must be observed.

1. Install longitudinal member (2), fit with straightener, and fix in place.
2. Drill rivet holes on the longitudinal member (2) with a diameter of 6.7 mm through the existing holes in the body (area A).
3. Remove longitudinal member (2).
4. Deburr rivet holes at longitudinal member (2) and body on both sides.
5. Remove drilling chips.

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   Courtesy of MERCEDES-BENZ USA

6. Install longitudinal member (2) with straightener and fix in place.
7. Rivet longitudinal member (2) with rivets with a diameter of 6.5 x 14.5 mm (area B₁ ).
8. Longitudinal member (2) (areas B₂ ).
9. Surface grind plug spot welds on the longitudinal member (2) (areas B₂ ).

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10. Install left rear-end floor (1), fit, and fix in place.
11. Drill rivet holes in left rear-end floor (1) with a diameter of 6.7 mm through existing holes in body (areas C).
12. Remove left rear-end floor (1).
13. Deburr rivet holes at left rear-end floor (1) and body on both sides.
14. Remove drilling chips.

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15. Apply 2-component adhesive to body in crosshatched areas.

    Observe pretreatment of bonding surfaces and manufacturer's specifications for drying and processing time of 2-component adhesive.

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16. Install and fix in place left rear-end floor (1).
17. Rivet left rear-end floor (1) with rivets with a diameter of 6.5 x 14.5 mm (areas D₁ , D₂ , D₃ , D₄ , D₅ , and D₆ ).
18. Rivet left rear-end floor (1) with rivets with a diameter of 6.4 mm (area E₁ ).
19. Left rear-end floor (1) (areas E₂ , F₁ , F₂ and F₃ ).
20. Left rear-end floor (1) (area G).

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    Courtesy of MERCEDES-BENZ USA

21. Left rear-end floor (1) (area H).

    Perform inert gas welding at intervals and allow to cool down in between. This reduces heat distortion.

22. Install spring mount (2.1), fit with the straightener, and fix in place.
23. Drill through rivet holes on the spring mount (2.1) with a diameter of 6.7 mm (areas J).
24. Remove straightener and spring mount (2.1).
25. Deburr rivet holes on spring mount (2.1) and body.

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26. Apply 2-component adhesive to body in crosshatched areas.

    Observe pretreatment of bonding surfaces and manufacturer's specifications for drying and processing time of 2-component adhesive.

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27. Install spring mount (2.1) and fix in place.
28. Rivet spring mount (2.1) with rivets with a diameter of 6.5 x 12.5 (areas K₁ ).
29. Rivet spring mount (2.1) with rivets with a diameter of 6.5 x 14.5 (areas K₂ ).

    Courtesy of MERCEDES-BENZ USA