A drive assembly for moving a curtain of a vehicle includes a drive rack, an idle gear engaged with the drive rack, a motor assembly and an actuator. The motor assembly includes a drive gear engageable with the idle gear, a gearbox connected to the drive gear, and a motor connected to the gearbox for driving the drive gear. The actuator is for moving the motor assembly between an idle position, wherein the idle gear is idle, and a drive position, wherein the drive gear is engaged with the idle gear for driving the idle gear. When the motor assembly is in the drive position, the idle gear is drivable by the motor to move the idle gear along the drive rack. One of the drive rack and the idle gear is mountable on the curtain so as to move the curtain between a first and a second position.