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They're a mix of NVH supressing aids and and rain deflectors, the polo has them and so do the Bentleys - heck the current SEAT Leon/Toledo/Altea have the windscreen wipers there to act as rain deflectors and wipers for aero reasons (i'll try and find pics)
on the polo they work great at highway sped I can have the wind down an inch or two when its raining and there's no swirl-round
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good things come to those who wait, sh*t turns up pretty much instantly
twitter.com/bertchalmers
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