When we had those really hot days a few weeks ago I tried setting it to chill ready for my wife to leave work and apparently it worked a treat! Ice cold when she got in. That was remotely via the App; I don't understand the unlock method yet!
You have to have the A/C turned on from when you last used the car, if it is on when you park it and the is enough charge it will switch on the A/C as part of the pr entry cooling. It works with both the app and the key on mine.
Thank you Mike, I think you've nailed it with that explanation. The two conflicting posts above yours didn't seem to make any sense at all.
I've just done a series of tests with ambient OAT of 20°C, a demanded temperature of 17°C and "Auto" selected. All louvres closed except the driver's centre console louvre.
With AirCon OFF before shut down the PCC with key resulted in an airflow temperature of 13° from the single louvre.
With Aircon ON before shut down (having been run only briefly) the PCC with key gave an airflow temperature that dropped fairly quickly to 6°C.
I was unsure whether this might have been the result of residual cooling in the AirCon so I left it running for as long as I dare (given the 5 min time limit). The airflow temp remained constant at 6°C.
I'll probably do a few more tests to make sure that my results weren't a fluke; but at the moment it looks as though sxileander's and your results can be relied upon. And I'll read the manual's pages yet again to see if and where we are told about this. I've certainly found the bit on page 156 para two that states what "Dodgy" thought was the case. And he was right as far as it went.
Thanks again