Prepare Firewall Half For Installation - Ar62.25-P-1110-02LF

Model 217 

Model 222 

except code Z07 (B7 armoring on special protection version) 

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

Courtesy of MERCEDES-BENZ USA

Shown on MODEL 222 

1. Mark separating points on firewall (1) and cut (areas A and B).

   Take separation points from vehicle.

2. Cut out spot welds on firewall (1) (areas C and D).

   Cut out spot weld through two panel thicknesses (area D).

3. Bend up sheet metal flange in direction of arrow.

   It is necessary to bend up the sheet metal flange to install firewall (1).

4. Remove sections from firewall (1).
5. Grind mating surfaces on firewall (1) down to bare metal in crosshatched areas.

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

6. Remove grinding dust and drill chips.

   Observe pretreatment of bonding surfaces (areas E).

   Shown on MODEL 222 

   Courtesy of MERCEDES-BENZ USA

7. Grind mating surfaces on firewall (1) down to bare metal in crosshatched areas.
8. Remove grinding dust and drill chips.

   Observe pretreatment of bonding surfaces (areas F).

   Shown on MODEL 222 

   Courtesy of MERCEDES-BENZ USA

   Courtesy of MERCEDES-BENZ USA

   Shown on MODEL 222 

9. Mark separating points on firewall crossmember (3) and cut (areas G).

   Take separation points from vehicle.

10. Drill Ø 6.5 mm spot welds in firewall crossmember (3) (area H).

    Courtesy of MERCEDES-BENZ USA

    Shown on MODEL 222 

11. Heat firewall crossmember (3) in crosshatched areas.

    Cross-hatched areas are bonded.

12. Remove section from firewall crossmember (3).
13. Grind mating surfaces on firewall crossmember section (5) down to bare metal in crosshatched areas.
14. Remove grinding dust and drill chips.

    Observe pretreatment of bonding surfaces (areas I).

    Shown on MODEL 222 

    Courtesy of MERCEDES-BENZ USA

    Courtesy of MERCEDES-BENZ USA

    Shown on MODEL 222 

15. Mark separating point on firewall crossmember (3) and cut (area J).

    Take separation points from vehicle.

16. Drill Ø 6.5 mm spot welds in firewall crossmember (3) (area K).
17. Remove section from firewall crossmember (3).
18. Grind mating surfaces on crossmember on firewall (3) down to bare metal in crosshatched areas.
19. Remove grinding dust and drill chips.

    Observe pretreatment of bonding surfaces (areas L).

    Shown on MODEL 222 

    Courtesy of MERCEDES-BENZ USA

20. Grind mating surfaces on crossmember on firewall (3) down to bare metal in crosshatched areas.
21. Remove grinding dust and drill chips.

    Observe pretreatment of bonding surfaces.

    Firewall crossmember (3), inside, shown on MODEL 222 

    Courtesy of MERCEDES-BENZ USA

    Courtesy of MERCEDES-BENZ USA

    Shown on MODEL 222 

22. Mark separating point on windshield crossmember (2) and cut (area M).

    Transfer separation point from vehicle.

    Courtesy of MERCEDES-BENZ USA

    Shown on MODEL 222 

23. Grind windshield crossmember (2) down to bare metal in crosshatched areas.

    Courtesy of MERCEDES-BENZ USA

    Windshield crossmember (2), inside, shown on MODEL 222 

24. Grind mating surfaces on windshield crossmember (2) down to bare metal in crosshatched areas.

    Observe pretreatment of bonding surfaces.

25. Remove grinding dust and drill chips.