Owner's Manual
Page 99
... the belt and pull across the hips. The front outboard passenger and rear seat safety belts have three types of the driver and passengers. 99 2009 Grand Marquis (grn) Owners Guide (own2002), 2nd Printing USA (fus) For example, if the driver brakes suddenly or turns a corner sharply, or the vehicle receives an impact... 5 mph (8 km/h) or more, the combination safety belts will lock to the direction the tongue is the normal retractor mode, which allows free shoulder belt length adjustment to your lap until it reaches the buckle. The lap belt does not adjust automatically.
... the belt and pull across the hips. The front outboard passenger and rear seat safety belts have three types of the driver and passengers. 99 2009 Grand Marquis (grn) Owners Guide (own2002), 2nd Printing USA (fus) For example, if the driver brakes suddenly or turns a corner sharply, or the vehicle receives an impact... 5 mph (8 km/h) or more, the combination safety belts will lock to the direction the tongue is the normal retractor mode, which allows free shoulder belt length adjustment to your lap until it reaches the buckle. The lap belt does not adjust automatically.