[quote=70GT6]
From Owners Manual:
To Unlock the Doors: Press and release the unlock button on the key fob.
NOTE: If within 40 seconds of unlocking with the key
fob, neither door is opened, the key is not inserted in the
ignition switch, or the central locking switch is not
activated, the vehicle will automatically lock.
That's the rub though the first auto lock. I hadn't unlocked it with the fob. Turned the car off, the doors were unlocked and the keys were on the table. After that I can understand because I did unlock it with the fob and left the doors closed, so that one makes sense, not just the first one.