>>>I have the same problem. Here's my solution: Close the vent window, fold up a
>>>piece of paper, shove it between the latch and the vent frame, never open the
>>>vent again.

My problem too is whistling at highway speeds on one side; my solution is
somewhat more expensive than Roy's.  I close the latch on a dime!

                                Richard A. Jones
                                Boulder, Colorado
                                (where it just stopped snowing)
                                '81 Vanagon  Mr Bus