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:

Switch operation
The windshield wiper and washer operates when the ignition switch is in the ON position. Push the lever down to operate the wiper at the following speed: 1 Intermittent (INT) — intermittent op ...

Warning and indicator lights
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When reading the manual
This manual includes information for all options available on this model. Therefore, you may find some information that does not apply to your vehicle. All information, specifications and illu ...