I'm not sure if this is "normal" or not, but there is a fairly loud clacking sound (glass on metal) when I open my front doors. The rear doors don't do it. Because it's so well timed with the electronic latch noise the doors make when they open, my passengers don't really notice it. I've come to find that what's actually happening is my windows are not dropping down fast enough when the door opens, so the top of the window glass makes contact with the chrome trim. Does anyone else hear this noise or have this problem?