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

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.

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1. Mark separating point on left rear-end floor (1) and separate (area A).

   Dimensions: 

   a = 40 mm

   Do not cut too deeply.

   Otherwise the components below can be damaged and weakened.

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2. Expose spot welds on left rear-end floor (1) and cut out (areas B₂ , C₁ , C₂ , and C₃ ).
3. Expose spot welds on left rear-end floor (1) and drill with a 6.5 mm diameter bit (areas B₁ , C₄ , C₅ , C₆ , C₇ , C₈ , and C₉ ).

   Joint spot weld on panels arranged one behind the other must be cut out through two panel thicknesses (area B₂ ).

4. Expose spot welds on left rear-end floor (1) and cut out (area D).

   Courtesy of MERCEDES-BENZ USA

   Courtesy of MERCEDES-BENZ USA

5. Heat left rear-end floor (1) in cross-hatched areas.
6. Remove left rear-end floor (1).

   Cross-hatched areas are bonded with adhesive.

7. Expose spot welds on spring mount (2.1) and cut out (areas J).

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8. Heat spring mount (2.1) in cross-hatched areas.

   Cross-hatched areas are bonded with adhesive.

9. Remove spring mount (2.1).

   Courtesy of MERCEDES-BENZ USA

   Courtesy of MERCEDES-BENZ USA

10. Expose spot welds on longitudinal member (2) and drill with a 6.5 mm diameter bit (areas E).
11. Remove longitudinal member (2).
12. Sand down mating surfaces to bare metal in cross-hatched areas.

    Grind spot weld flange down to bare metal on both sides (area G₁ ).

13. Remove grinding dust.
14. Apply zinc dust paint to mating surfaces in cross-hatched areas (areas H and F).

    Do not coat bonding surfaces with zinc dust paint (areas G₁ and G₂ ).

    Otherwise adhesion problems can occur.

    Observe pretreatment of bonding surfaces.

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

    Observe pretreatment of bonding surfaces.

16. Remove grinding dust.

    Courtesy of MERCEDES-BENZ USA