These bushings are clamped into the dashboard and are used to finish and protect the ventilation knobs.
These shell casings have barbs that get stuck behind the dashboard. Once the buttons and the ventilation control have been removed, you can only remove the bushings by pressing the barbs in the boot. Unfortunately, most of them read this story too late and the bushings have already been removed by turning them over with a screwdriver, which tears or breaks the sockets or the ring.
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