FORD 2010 Mustang v.3 - Manual (Page 90)

Interior trunk control lockout (convertible vehicles only)
This feature helps prevent unauthorized access to the trunk when the
convertible top is open, by disabling the interior trunk control.
This is useful when you want to leave the convertible top open, but still
prevent access to the trunk.
To operate this feature (the vehicle must be off and accessory power
delay not active):
Lock the vehicle using the integrated keyhead transmitter or the power
door lock switch. The interior trunk control will now be disabled.
To enable the interior trunk control:
• use the integrated keyhead transmitter to unlock the vehicle.
• or turn the ignition on.
The interior trunk control will now work normally.
Driver Controls
90
2010 05+ Mustang (197)
Owners Guide, 3rd Printing
USA (fus)