Another tip: if you want to lock the vehicle without arming the alarm siren...just lock the vehicle manually using any of the other doors except the driver's door (it's the only one with the anti lock-out feature & can only be locked when it is closed)...as the last door to lock & close.
You can also use the central lock button on the center dash (if you can reach it)...again using any of the doors except the driver's door as your access/exit point. The central lock/unlock button doesn't arm the alarm system...and again, will work as long as you DON'T have the driver's door open.
If you use either of the methods above...make sure you have the car keys IN YOUR HAND before locking the last door...would hate to have someone lock their keys inside the vehicle...especially if they don't have a spare key handy.