DUAL Switch

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

When the DUAL switch indicator is not illuminated and the DUAL switch is pressed, the driver-side outlet and passenger-side outlet, as well as the setting temperature, can each be set independently.
When the DUAL switch indicator is illuminated and the DUAL switch is pressed, the driver-side outlet and setting temperature are applied to both sides.