Mercury 2002 Cougar Owner's Manual page 72

Locks and Security
Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to
operate the equipment.
The remote entry system allows you to lock or unlock all vehicle doors
and luggage compartment without a key.
The remote entry features only operate with the ignition in the OFF
position.
If there is any potential remote keyless entry problem with your vehicle,
ensure ALL remote entry transmitters are brought to the dealership,
to aid in troubleshooting.
Locking the doors
Press this control to lock all doors.
The lamps will flash to confirm all
doors are locked.
If any of the doors, hood and liftgate
are ajar, the lamps will not flash.
Unlocking the doors
Press this control to unlock the
driver's door. The interior lamps will
illuminate.
Press the control a second time
within three seconds to unlock all
doors.
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