FORD 2010 Flex v.2 - Manual (Page 174)

Locking Modes
All safety restraints in the vehicle are combination lap and shoulder
belts. All of the passenger combination lap and shoulder belts have three
types of locking modes:
Vehicle sensitive mode
This is the normal retractor mode, which allows free shoulder belt length
adjustment to your movements and locking in response to vehicle
movement. For example, if the driver brakes suddenly or turns a corner
sharply, or the vehicle receives an impact of approximately 5 mph
(8 km/h) or more, the combination safety belts will lock to help reduce
forward movement of the driver and passengers.
Webbing extraction sensitive mode
The webbing sensitive locking mode locks the webbing and prevents
more belt from being pulled out if the belt is pulled out too quickly. The
belt will unlock when you stop pulling on it.
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.
When to use the automatic locking mode
This mode should be used any time a child safety seat (except a
booster) is installed in a passenger front or rear seating position with a
combination lap/shoulder safety belt. Children 12 years old and under
should be properly restrained in a rear seating position whenever
possible. Refer to Safety restraints for children or Safety seats for
children later in this chapter.
Seating and Safety Restraints
174
2010 Flex (471)
Owners Guide, 2nd Printing
USA (fus)