Jeep 2004 Liberty Owner's Manual page 131

UNDERSTANDING THE FEATURES OF YOUR VEHICLE 131
3
Press and hold the "V" button in the center of the sunroof
switch to open the vent. The sunroof can be stopped at
any position between closed and full vent. To close the
sunroof from the vent position, press and hold the switch
forward. Releasing the switch will stop the movement of
the sunroof and the sunroof will remain in the partial
vent position until the switch is pushed forward again.