Mercury 2002 Cougar Owner's Manual page 86

Seating and Safety Restraints
Automatic locking mode
How to use the automatic locking mode
Buckle the combination lap and
shoulder belt.
Grasp the shoulder portion and
pull downward until the entire
belt is extracted.
Allow the belt to retract. As the belt retracts, you will hear a clicking
sound. This indicates the safety belt is now in the automatic locking
mode.
In this mode, the shoulder belt is automatically pre-locked. The belt will
still retract to remove any slack in the shoulder belt.
The automatic locking mode is not available on the driver safety belt.
86