Auto Door Locking

[Glenn]

I have just purchased a new 2016 spec BRZ. I would like the doors to lock automatically when the ignition is turned on. I have followed the instructions, turn on ignition, press 7 on the key pad, turn off ignition within 5 seconds, but still the doors do not lock. I went back to the dealer who contacted Subaru who said this feature is may not be available on my model. Can anyone confirm if it should or should not work.

Thanks