general problems of the 2013 Volkswagen Jetta

A couple of weeks after buying this new vehicle I noticed that hundreds of foggy looking spots would appear in the rear windshield at certain times of the day. When these spots appear it is almost impossible to see out of this windshield or into it . This usually happens around dawn and around dusk though it has happened at other times of the day also. I have pursued having this problem resolved by contacting the dealer several times only to be told it is because of the window being polarized and that the window is up to manufacturer specifications. Pretty much they have told me, too bad that's the way it is. I have expressed to the dealer and to Volkswagen of America that this is a safety issue due to the fact that you can not see out of or in through the windshield when these foggy spots are there. After months of trying to get them to at least acknowledge there is a problem they finally sent an executive down to look at the problem. Their last time I heard from them, they said they would tint the rear windshield so that I wouldn't see the problem. To me this does not make any sense. If you try to cover up the problem you do not solve the problem. I feel that they are trying to cover up a manufacturing problem and ignoring safety issues. I don't know who to talk to or where to go from here with this problem. It seems as though I am getting nowhere with them. I am reading about others with the same problems in vw forums on the internet and am sure there must be other complaints about this problem and am wondering if others have sent complaints into this department also. Any help would be appreciated.