Other than obvious rattles/creaks that seem to come up in most any car, it seems as if most E90 owners experience this the worst. It's a creak in the front/rear doors that is worse when it's cold out (blistering 74 in L.A. today), and mostly noticeable on driveways and speed bumps.
Oh well, doubt there's much that can be done about it. Sure you can take it to the service department, but the odds that they fix it right, let alone on the first time is slim to none
