Mine is different (MY2011), it has an OFF button at the bottom instead of the MONO button. You have to press and hold the AUTO button on the left (which is the driver side over here) for a few seconds in order to engage the mono mode and link the two temperature zones. As soon as you move the right button (passenger side) they get unlinked.
No FULL AUTO mode… I think AUTO is the most you can get.
And I have a problem. If want to turn off AC by unpressing the snowflake icon, it will turn on automatically after a certain time. Maybe because auf the mist sensor? Mine is like the one in the attachment.