Removing windows with an oscillating knife (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)

Always wear safety goggles and protective gloves for your own safety

Cover the working area (side walls, roof-mounted antenna and if necessary, interior equipment) with protective covers

Tape off body with fabric adhesive tape (e.g. Tesa) in areas where the oscillating knife could damage the window glass or the paint

Use suction cups (51 3 010) to lift out the window glass

Always keep both suction cups dry and clean to ensure optimum adhesion on the windshield

Secure window glass against falling out

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Depending on the area of application, knife 1 or 2 is used 

1. Straight knife with adjustable thrust roller
2. U-shaped knife

   Dimension (X) on the knife (1) can be adjusted individually, see vehicle-specific repair instructions

   NOTE: Sharpen knife blade before every use on a running machine with a grinding stone (even with new knife blade)

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Removing from the inside: 

Guide knife carefully between body and window glass

Run blade of knife parallel to glass

Take care not to damage paintwork

Cut through adhesive bead all the way around

Pull window glass outwards to remove

Courtesy of BMW OF NORTH AMERICA, INC.

Removal from outside: 

Guide knife carefully between body and window glass

Run blade of knife parallel to glass

Take care not to damage paintwork

Cut through adhesive bead all the way around

Pull window glass outwards to remove

Courtesy of BMW OF NORTH AMERICA, INC.

Cut through adhesive bead as closely as possible to window glass 

1. Body aperture
2. Adhesive bead
3. Knife
4. Window

   Courtesy of BMW OF NORTH AMERICA, INC.