Window scrapers and they don't stop the water going into the doors. The plastic membrane on the inside of the doorcard stops the water entering the cab whilst the water that gets into the doors drips out through drain holes in the bottom of the door.
vw emporium also sell window scrapers
http://www.volkswagenemporium.co.uk/sho ... php?cat=11" onclick="window.open(this.href);return false;
as well as VW commercial dealers (£16.50 each iirc)