I recently purchased a 2022 Kia Sorento PHEV and I find the Plug-in Hybrid Drive modes puzzling. I previously owned another PHEV, a 2017 Chevrolet Volt, and that may be why; its drive modes operated differently that the Kia’s. I am both embarrassed, because it seems too obvious, and a little frustrated because it also seems more complicated than it should be to get a definitive answer. What does the “Auto” mode really do?