Once all your doors, incl boot are closed.
You just press the "lock" button once ........ and it locks the doors ........ then folds the mirrors in.
←
Quick question though, and maybe I have this the wrong way round, but I always lock my doors when driving - London you know what its like, I was led to believe that the auto wing mirror closure works of that relay so when you dead lock they fold in - not great when your driving around.