Mono Mode
WARNING: This page is about a different car, the 2015 Ford C-Max. However, it is still accessible from the selected car via links, so may be relevant.
Press and hold the AUTO button to enter the mono mode. The passenger side temperature is be adjusted to the driver side temperature setting. If the rotary control on the driver side is changed, the system also adjusts the temperature on the passenger side. To exit mono mode, select a temperature for the passenger side using the rotary control on the passenger side. The temperature can now be changed independently.