Protecting vehicle passenger compartment

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To avoid damage and possible dirt contamination, protect A-pillars, roof and dashboard trim panel (3) by means of plastic washer (1)
Always carry plastic washer (1) between respective wire (2) being tightened and trim panel components

Fig 1: Identifying Plastic Washer, Respective Wire, Roof And Dashboard Trim Panel
Courtesy of BMW OF NORTH AMERICA, INC.