Ford Mustang Owner's Manual page 107

the active anti-theft system, the horn will make two quick chirps and the
turn signal lamps will not flash if either door or the trunk are not closed.
Car finder
Press twice within three seconds. The horn will chirp and the turn
lamps will flash. It is recommended that this method be used to locate
your vehicle, rather than using the panic alarm.
Sounding a panic alarm
Press to activate the alarm. The horn will sound and the turn signal
and interior lamps will flash for a maximum of approximately three
minutes. Press again or turn the ignition to the accessory or on
position to deactivate, or wait for the alarm to time-out in approximately
three minutes.
Note: The panic alarm will only operate when the ignition is in the off
position.
Opening the trunk
Press twice to open the trunk.
• Ensure that the trunk is closed and latched before driving your
vehicle. Failure to properly latch the trunk may cause objects to fall
out or block the driver's rear view.
The remote entry system allows you to open the trunk while the ignition
is in any position. However, if the ignition is in the on position and the
vehicle is in motion, the trunk will not open if the vehicle is moving
3 mph (5 km/h) or faster.
In the event of battery failure, you
can open the trunk on the
convertible by using your master
key in the key cylinder between
the seat cushion located in the
back seat on the driver's side.
2011 05+ Mustang (197)
Owners Guide, 1st Printing
USA (fus)
Locks and Security
107