I have an annoying rattle that SEEMS to be coming from the left vent, every time I run over small bumps. I have always had this and it was even present in my loaner CT when I had the 6 month service! If anyone finds the source, please let me know! Update: I finally had the dealership insulate the dash, especially around and in the square patch in the center. That square panel was vibrating off and on. Nice and solid now!