Install Rear Longitudinal Member - Ar64.20-P-1200-24MFC

Model 177.1/9 

with code U54 (Compound-link axle) 

except code U55 (Multi-link axle) 

The next steps are shown on the left side of the vehicle. This must be similarly performed for damage to the right side of the vehicle.

The superordinate service document as well as the safety information in the service document must be observed.

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1. Install, fit, and fix in place the rear longitudinal member(1) with connection(2), cover(5), and straightener.
2. Drill rivet holes in rear longitudinal member (1) with Ø 6.7 mm (areas A₆ and A₈ ).
3. Drill rivet holes in rear longitudinal member (1) with Ø 6.7 mm through existing holes in body (area A₇ ).
4. Drill rivet holes in cover (5) with Ø 6.7 mm (areas A₁ , A₂ , A₃ and A₄ ).
5. Drill rivet holes in rear longitudinal member (1) with Ø 6.7 mm through existing holes in body (area A₅ ).
6. Drill rivet holes in rear longitudinal member (1) with connection (2) with Ø 6.7 mm (areas B₁ , B₂ and B₃ ).

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7. Install, fit, and fix in place the cover(4) and the support for the rear bench seat(6).
8. Drill rivet holes in cover (4) with Ø 6.7 mm (areas C₁ , C₂ , C₃ , C₄ , C₅ , C₆ , C₇ , C₈ and C₉ ).
9. Drill rivet holes in rear bench seat mount (6) with Ø 6.7 mm (areas D₁ , D₂ , D₃ and D₄ ).

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10. Install, fit, and fix in place reinforcement for the rear seat(3).
11. Drill rivet holes in rear seat reinforcement (3) with Ø 6.7 mm (areas E₁ , E₂ , E₃ , E₄ and E₅ ).
12. Remove rear seat reinforcement (3), rear bench seat support (6), cover (4), rear longitudinal member (1) with connection (2), and cover (5).
13. Deburr rivet holes on rear seat reinforcement (3), rear bench seat support (6), cover (4), rear longitudinal member (1) with connection (2) cover (5) and on the body on both sides.
14. Remove drill chips.
15. Coat insides of riveted joints with zinc dust paint.

    Do not coat insides of the riveted joints to which the 2-component adhesive is applied with zinc dust paint.

    Otherwise adhesion problems can occur.

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16. In the cross-hatched area apply the 2-component adhesive to the body (area F₁ ).

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

17. In cross-hatched area apply 2-component adhesive on rear longitudinal member (1) with connection (2) (area F₂ ).

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

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18. Install and fix in place the rear longitudinal member(1) with connection(2), and cover(5).
19. Rivet the rear longitudinal member(1) using rivets with a diameter of 6.5x14.5 mm (areas G₁ and G₂ ).
20. Rivet the cover (5) using rivets Ø 6.5x14.5 mm (areas H₁ , H₂ , H₃ , H₄ and H₅ ).

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21. Rivet rear longitudinal member (1) with connection (2) with rivets Ø 6.5x14.5 mm (areas I₁ , I₂ and I₃ ).
22. Apply 2-component adhesive in cross-hatched area on rear longitudinal member (1) (area J).
23. Install and fix in place the cover(4) and the support for the rear bench seat(6).
24. Rivet the cover(4) using rivets Ø 6.5x12.5 mm (areas K₁ , K₂ , K ₃ , K₄ , K₅ , K₆ , K₇ and K₈ ).
25. Rivet the cover(4) using rivets Ø 6.5x14.5 mm (areas L₁ , L₂ , L₃ and L₄ ).
26. Rivet the support for the rear bench seat(6) using rivets Ø 6.5x14.5 mm (areas M₁ , M₂ and M₃ ).

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27. Install and fix in place the reinforcement for the rear seat(3).
28. Rivet rear seat reinforcement (3) using Ø 6.5x14.5 mm rivets (areas N₁ , N₃ , and N₄ ).
29. Rivet the reinforcement for the rear seat(3) using rivets Ø 6.5x12.5 mm (areas N₂ and N₅ ).
30. Reinforcement for the rear seat(3) (area O).

    Carry out inert gas welding in intervals and allow the welding area to cool down in between to reduce heat distortion.

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31. Install spring mount (1.1), fit with the straightener, and fix in place.
32. Drill out rivet holes on spring support (1.1) with a Ø 6.7 mm bit (areas P).
33. Remove straightener and spring mount (1.1).
34. Deburr rivet holes on spring mount (1.1) and body.

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35. Apply 2-component adhesive in cross-hatched areas on body.

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

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36. Install spring mount (1.1) and fix in place.
37. Rivet spring support (1.1) with Ø 6.5x12.5 mm rivets (areas Q₁ ).
38. Rivet spring support (1.1) with Ø 6.5x14.5 mm rivets (areas Q₂ ).

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