We don't have the auto HVAC and the heated seats still go on. Heater just goes on to whatever setting it was left on when the vehicle was shut off. I wish the seats stayed on once the key is inserted, but it's not a big deal to hit the switch I guess.
I'm glad they don't stay on. It's a nice feature that they work with remote start to get the cabin habitable until I (or we) enter, but I'm glad it's programmed to surrender choice and control to the driver/passenger once the car is started.
My wife reported to me that in our cloth-interior, manual-knobs-dual-zone-hvac, remote-start-enabled 2011 truck, that the hvac blows cold until the key in event. I know there's those who will chime in and say "in these colder temps, the truck isn't fully warmed up yet" but even with the knobs full heat and blower full on, the truck is ice-cold until the key-on event, then the heat comes right out of the vents (proving that the truck has started to warm up) at full blast due to the climate control settings.
Since we have the cloth interior, I know we don't have the heated seats... but I ask others with the manual-dual-zone-hvac and remote start, does your heat come on before key-in?
In my g8, it strives to bring the interior to 72 degrees (full on heat in the winter, full on A/C in the summer) when remote start is activated, prior to key-in event. I do have the auto-dual-zone-"temperature" style stuff on my g8 so I'm sure this is apples to oranges.