Protecting Car Interior

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 135i, and 2010 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.

To avoid damage and if necessary dirt, protect A-pillars, roof and instrument panel trim (3) by means of plastic disc (1)
Always carry plastic disc (1) between respective wire (2) being strained and trim panel components

Fig 1: Identifying Plastic Disc, Wire With Roof & Instrument Panel Trim
Courtesy of BMW OF NORTH AMERICA, INC.