For traditional key, you can turn the ignition to "ACC" to shut the engine off while keep all the accessories on. With this new key, I don't see how to do it. When you pushed the key to stop the engine, everything is shut off including the music.
Another interesting thing is that one day, I copied all my music to an SD card, and inserted it into the SD slot, AMI automatically started to play music. Since I didn't bring the key with me, I can't shut off the music !
(the volume button can only mute the music)
I have to go back to my room to get the key and push it twice (turn on and shut off)