The only rattle I have on my Copen is the driver's window - any suggestions on how to cure this would be much appreciated
Get the door card off and have a look. The "little felt runner U profile" things might have migrated downwards and be sitting free style in the bottom of the door, or one of the clamps that mounts the glass to the electric window mechanism might have come loose. Never had to fix a rattling one before, but they are a pretty simple little system.