On the VW Polo, the "clips" are a bit wide . they don't fit all the way. I made a cut in the center of the sponges and expanded the cut with a needle file (sandpaper) under the abutting vertical internal "blinds" in the airflow grille. Sits like a "native"! I recommend. The magnet is tenacious, good!
I have added some photos to my review to give a more detailed account of my experience.
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