Prepare Front Roof Frame For Installation - Ar65.20-P-1006-04LCA

Model 217.4 

The following steps are shown on the left side of the vehicle and must be accomplished analogously on the right side of the vehicle.

1. Mark separating points on front roof frame (1) and cut (areas A).

   Do not make the cuts too deep.

   Otherwise the sheet metal panel (1.2) behind of the front roof frame may be damaged.

   Transfer separation points from vehicle.

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2. Expose spot welds on roof frame (1) and cut out (areas B₁ , B₂ and B₃ ).
3. Remove roof frame (1) from sheet metal panel (1.2).

   Courtesy of MERCEDES-BENZ USA

   Courtesy of MERCEDES-BENZ USA

4. Grind mating surfaces on roof frame (1) down to bare metal in crosshatched areas.

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

5. Grind mating surfaces on stiffening plate (3) down to bare metal in crosshatched areas.

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

6. Sand down spot weld flanges to bare metal on both sides.
7. Repair bare parts with touchup applicator.
8. Remove grinding dust and drill chips.
9. Coat insides of spot weld flanges with zinc dust paint.
10. Grind mating surfaces on new mounting console (2) down to bare metal in crosshatched areas.

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

11. Repair bare parts with touchup applicator.
12. Remove grinding dust and drill chips.
13. Coat insides of spot weld flanges with zinc dust paint.

    Do not coat bonding surfaces with zinc dust paint (areas C₁ ).

    Otherwise adhesion problems may occur.

    Grind brazing solder flange down to bare metal on both sides (areas C₂ )

    Observe pretreatment of bonding surfaces.

Courtesy of MERCEDES-BENZ USA