Try replacing the metal hog rings with zip ties, it could be they are shorting out the heating element. Things will be a little more clear when you get it apart which you will need to do if you just want to swap the cover anyway.

__________________
1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)