Agreed, applying logic to the system makes sense...along those lines, I would think the seat belt sensor should be able to enable the HVAC for the 3rd row... if the seats are up and the seatbelt loop is closed (seatbelt is on at least one passenger in the 3rd row) then enable the physical controls in the 3rd row (and on the front screen), otherwise disable in both places, unless seats are down, then only enable controls on the front screen (disable 3rd row controls)... this would allow driver to decide if the 3rd row should be active. Seems like it should be pretty easy and the sensors/trigger devices are there already, but this may be more complex than an average consumer would understand?
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