Infiniti QX: Windshield deicer (if so equipped) - Rear window and outside mirror defroster/windshield deicer (if so equipped) 
switch - Instruments and controls - Infiniti QX Owner's ManualInfiniti QX: Windshield deicer (if so equipped)

The windshield deicer switch (rear window and outside mirror defroster switch) operates when the ignition switch is in the ON position. The deicer is used to remove ice from the windshield when a wiper is frozen to the windshield. When the switch 1 is pushed, the indicator light 2 illuminates and the deicer operates for approximately 15 minutes. The rear window defroster will activate at the same time. After the preset time has passed, the deicer will turn off automatically. To turn off the deicer manually, push the deicer switch again, and the indicator light turns off.

CAUTION
► When operating the deicer continuously, be sure to start the engine. Otherwise, it may cause the battery to discharge.
► When cleaning the inner side of the window, be careful not to scratch or damage the electrical conductors on the surface of the window.

    Rear window and outside mirror defroster
    To defog/defrost the rear window glass and outside mirrors, start the engine and push the switch 1 on. The indicator light 2 will come on. Push the switch again to turn the defroster off. ...

    See also:

    Top Tether
    WARNING   Always lock the rear seat backrests in their upright position when the rear seats are occupied by passengers. Lock the rear seat backrests in their upright position before ins ...

    Antenna
    Window antenna The antenna pattern is printed inside the 3rd row seat window. CAUTION ► Do not place metalized film near the 3rd row seat window or attach any metal parts to it. This ...

    Activating/deactivating airrecirculation mode
    You can deactivate the flow of fresh air if unpleasant odors are entering the vehicle from outside. The air already inside the vehicle will then be recirculated. The operation of air-recirculati ...