These type of seeds are a real problem for me too. They get everywhere in the car. I have a Silver Birch, two huge Lime trees and a Copper Beech in the garden/road next to the house and every autumn is a battle. Big leaves are not a problem but these little blighters get into everthing. 
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2002 D2 S8 – Ming Blue, Valcona leather, Vavona wood insert, solar sunroof (to be fitted), Heated rear seats, extended leather pack, 18” Avus, ski hatch, Bose, auto dim rear view mirror, rear blind.
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