It seems like you should be able to get this covered under warranty. Also, I'd spend 5 dollars on a snow brush.
ED - 5/13/2013
See my ED planning thread here
and help me plan my trip!
Future 2013 335i Sport Line PPK| Alpine White/Coral Red | ZDH | ZCW | 2TB | ZTP | ZPP | 508+3AG | 5AC