Originally Posted by MMME30W
Locking is done on a CA car either by pressing the 'lock' button on the fob, or resting a finger lightly on the ridged surface on the door handle until it locks.
I dunno if the car locks automatically. Be curious if anyone knows.
PS Owners manuals are available on www.bmwusa.com
under the Owner section.
I believe the car can be set to lock automatically after a specified period of time.