In the Model 3 you cannot close the vents on either the driver or passenger side. Your only option is to divert the air or change the temperature.Finally got a chance to try this. I can independently adjust the direction of the airflow, but no dedicated temp option for passenger.
That got me thinking, how do you close the vents entirely on either side? My wife usually does that if I have the air running cold.
Many have requested this as an enhancement since you can close vents in any ICE car.