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Separate A-pillar closing panel - AR63.20-P-1100-12SX

Fig 1: Identifying Spot Weld Milling Cutter (201 589 00 51 00)
G07583639Courtesy of MERCEDES-BENZ USA
COMMERCIALLY AVAILABLE TOOLS

Number Designation
WH58.30-Z-1002-01A Ball cutter, dia. 12 mm
WH58.30-Z-1001-03A Round wire brush, braided, dia. 70 mm
WH58.30-Z-1024-04A Abrasive disk, dia. 115 mm, 80 m/s (max. 13, 250 RPM)
WH58.30-Z-1004-20A Hot-air gun
WORKSHOP EQUIPMENT

WE58.40-Z-1001-03A Drill (electric/pneumatic)
WE58.40-Z-1003-03A Angle grinder (electric/pneumatic)
WE58.40-Z-1005-03A Wet/dry vacuum cleaner
REPAIR MATERIALS

Number Designation Order number
BR00.45-Z-1001-07A Zinc dust paint suitable for spot welding A 000 986 34 42
  1. Expose spot welds on A-pillar closing panel (1) and A-pillar support (2) (areas A, B, C, D, E, F and G).
    Fig 2: Identifying A-Pillar Closing Panel Spot Welding Areas
    G07583640Courtesy of MERCEDES-BENZ USA
  2. Cut out spot welds on A-pillar closing panel (1) and A-pillar support (2) using SPECIAL TOOL spot weld milling cutter or COMMERCIALLY AVAILABLE TOOLS ball cutter (areas A, B, C, D, E, F and G).

    IMPORTANT Cut through two sheet metal layers (area B).

  3. Expose spot welds on A-pillar closing panel (1), upper firewall support (3) and lower firewall support (4) (areas H, J, K, L and M).
    Fig 3: Identifying A-Pillar Closing Panel Spot Welding Areas
    G07583641Courtesy of MERCEDES-BENZ USA
  4. Cut out spot welds on A-pillar closing panel (1), upper firewall support (3) and lower firewall support (4) using SPECIAL TOOL spot weld milling cutter or COMMERCIALLY AVAILABLE TOOLS ball cutter (areas H, J, K, L and M).

    IMPORTANT Cut through two sheet metal layers (area K).

  5. Heat A-pillar closing panel (1) in cross-hatched areas using COMMERCIALLY AVAILABLE TOOLS hot air gun.
    Fig 4: Identifying A-Pillar Closing Panel Heating Area
    G07583642Courtesy of MERCEDES-BENZ USA

    IMPORTANT Cross-hatched areas are additionally bonded.

  6. Completely remove damaged A-pillar closing panel (1).
  7. Grind mating surfaces on vehicle down to bare metal in cross-hatched areas using COMMERCIALLY AVAILABLE TOOLS round wire brush.

    IMPORTANT Grind spot weld flanges down to bare metal on both sides.

  8. Remove grinding and drill shavings using wet/dry vacuum cleaner.
    Fig 5: Identifying Vehicle Mating Surfaces
    G07583643Courtesy of MERCEDES-BENZ USA
  9. Using zinc dust paint, coat insides of spot weld flanges that were not additionally bonded.

NOTES To prevent adhesion problems, do not coat bonding surfaces with zinc dust paint. (areas N, O and P).

IMPORTANT Observe pretreatment of bonding surfaces.