Rear Longitudinal Member Section Preparation - Ar64.20-P-1260-02MFF

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. Grind mating surfaces at longitudinal member (2) down to bare metal in cross-hatched areas.

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

   Observe preliminary treatment of bonding surface.

2. Remove grinding dust.

   Courtesy of MERCEDES-BENZ USA

3. Drill off rivets on spring mount (2.1) with a 6.5 mm diameter bit (areas A₂ ).
4. Remove spring mount (2.1).

   Courtesy of MERCEDES-BENZ USA

5. Longitudinal member (2) (areas A3).
6. Surface-grind plug spot welds on longitudinal member (2) (areas A₃ ).

   Courtesy of MERCEDES-BENZ USA

7. Grind mating surfaces on spring mount (2.1) down to bare metal in cross-hatched areas on inside.
8. Remove grinding dust.

   Observe preliminary treatment of bonding surface.

   Courtesy of MERCEDES-BENZ USA

   Courtesy of MERCEDES-BENZ USA

9. Mark and cut separating point at left rear-end floor (1) (area B).

   Transfer separation point from vehicle.

10. Grind mating surfaces at left rear-end floor (1) down to bare metal in cross-hatched areas.

    Courtesy of MERCEDES-BENZ USA

11. Grind mating surfaces at left rear-end floor (1) down to bare metal in cross-hatched areas.

    Grind spot weld flanges down to bare metal on both sides (areas C₁ and C₂ ).

12. Grind mating surfaces at left rear-end floor (1) down to bare metal on both sides in cross-hatched areas (areas C₁ and C₂ ).
13. Remove grinding dust and drill chips.

    Observe preliminary treatment of bonding surface.

14. Apply zinc dust paint to insides of spot weld flanges (areas C₁ and C₂ ).

    Courtesy of MERCEDES-BENZ USA