Rear window and outside mirror defroster/windshield deicer (if so equipped) switch

Rear window and outside mirror defroster/windshield deicer (if so equipped) 
switch  - Instruments and controls - Infiniti QX Owners Manual - Infiniti QX

See also:

Using system
Initialization: When the ignition switch is pushed to the ON position, Voice Recognition System is initialized, which may take up to one minute. When completed, the system is ready to accept voice co ...

Draining of coolant water
If the vehicle is to be left outside without antifreeze, drain the cooling system, including the engine block. Refill before operating the vehicle. For details, see Changing engine coolant in the ...

INFINITI all-mode 4WD system
The all mode 4WD system provides 3 positions (AUTO, 4HI and 4LO), so you can select the desired drive mode according to the driving conditions. 4WD shift procedure: 1: The 4LO and 4HI indic ...