[bavarianride]

Originally Posted by Dan B

I will allow for the possibility that due to how BMW engineered the car, maybe there is no difference in airflow with the shutters open or closed. So I will do some research, and try to find documentation on this.

BMW documenation does say "The engine control system only opens the radiator shutter when a higher level of cooling air is actually required", so that appears to confirm that opened shutter does improve airflow and cooling.