Greetings All: I bought my first BMW in November (2002 325 Ci) - I love it AND this website. Very informative. Here's my question... I have an annoying little whistle eminating from some part of the driver's side window when I reach highway speeds. Are any inserts or devices that can be plugging into the window frame to break up this airflow? I'm envisioning a thin little plastic fin, about an inch or two long, which could be positioned anywhere along the window frame. Has anyone heard of such a thing? Thanks in advance.