Separate bottom firewall section - AR62.25-P-1100-01P

WARNING: This page is about a different car, the 2009 Mercedes-Benz CLK350 and 2008 Mercedes-Benz CLK350. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Spot Weld Milling Cutter (201 589 00 51 00)

Courtesy 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)

WORKSHOP EQUIPMENT

WE58.40-Z-1001-03A	Drill (electric/pneumatic)
WE58.40-Z-1002-03A	Straight grinder (electric/pneumatic)
WE58.40-Z-1003-03A	Angle grinder (electric/pneumatic)
WE58.40-Z-1004-03A	Body saw (electric/pneumatic)
WE58.40-Z-1005-03A	Wet/dry vacuum cleaner

Expose spot welds (area A).
Cut out spot welds with spot weld milling cutter (area A).
Shown on model 203.0

Fig 2: Identifying Bottom Firewall Section Spot Welds (Area A)
Courtesy of MERCEDES-BENZ USA

Shown on model 203.0

Fig 3: Identifying Bottom Firewall Section Spot Welds (Area B, C & D)
Courtesy of MERCEDES-BENZ USA
Expose spot welds (area B).
Cut out spot welds with spot weld milling cutter (area B).
Expose welding spots (areas C and D).
Drill spot welds with 7 mm dia. spiral bit (areas C and D).
Expose spot welds (area D ₁ ).
Cut out spot welds with spot weld milling cutter (area D₁ ).
Shown on model 203.0

Fig 4: Identifying Spot Welds (Area D1)
Courtesy of MERCEDES-BENZ USA
Mark separation point (area E).
Cut separation point with body saw (area E).
Remove section from bottom of firewall.
Remove section from top of firewall.
Remove remaining flange from firewall.
Shown on model 203.0

Fig 5: Identifying Separation Point (Area E)
Courtesy of MERCEDES-BENZ USA
Sand down to bare metal connection surfaces in the shaded areas on both sides.
Remove grinding and drilling chips using wet/dry vacuum cleaner.
Shown on model 203.0

Fig 6: Identifying Connection Surfaces
Courtesy of MERCEDES-BENZ USA
Sand down to bare metal connection surfaces in the shaded areas on both sides.
Remove grinding and drilling chips using wet/dry vacuum cleaner.
Move drilling machine only in direction of arrow, to prevent wire brush from catching in sheet metal flange!

Shown on model 203.0

Fig 7: Moving Drilling Machine
Courtesy of MERCEDES-BENZ USA
Sand down to bare metal connection surfaces in the shaded areas on both sides.
Remove grinding and drilling chips using wet/dry vacuum cleaner.
Shown on model 203.0

Fig 8: Identifying Connection Surfaces
Courtesy of MERCEDES-BENZ USA