>I lock my Syncro like this all the time.  I have central locking, and the
>slider has a little black knob for manually locking it.  In order to save
>wear and tear on the central locking motors, I usually just leave the doors
>all locked and enter and exit through the side door using this little know
>to lock it as I am leaving.

Hmmm...maybe I need a new locking mechanism, as mine won't allow this.
Anyone out there got a spare LEFT-side sliding door lock?