To ensure safety, it is recommended that you lock the rear window switches whenever children are seated in the rear seats.
Locking rear windows in Model S/X
Press the rear window lock switch at the bottom of the control panel on the driver’s door. The switch light turns on. To unlock the rear windows, press the switch again.
Locking rear windows in Model 3
To prevent passengers from using the rear windows of the Model 3, go to Controls > Quick Controls > Window Lock. To unlock the rear windows, touch Window Lock again.