Ford 2011 Crown Victoria Owner's Manual page 280

Crown Victoria Severe Duty
If after repeating the procedure and two short beeps are heard when the
ignition is turned to off, seek assistance from your authorized dealer.
Brakes - police
The police vehicle is equipped with heavy duty front disc brake pads to
meet the varying demands of different police service for fade resistance
and other performance requirements.
The police vehicle has standard anti-lock brakes and may be equipped
with traction control.
Brake fluid maintenance
Police pursuits involving hard braking result in very high temperatures in
the brake system, including the brake fluid. Over time, repeated
exposure to high brake temperatures can degrade brake fluid, potentially
reducing its boiling point. A lower boiling point could cause long brake
pedal travel and a loss of braking confidence during subsequent pursuit
driving. Ford recommends that police fleets replace the brake fluid at
every brake pad service interval. Brake fluid may be replaced more
frequently on vehicles involved in frequent high-speed pursuits with
heavy brake usage.
INTERIOR
Heavy duty seats - police
The front seat assemblies, including the seat adjustment mechanisms and
supports, are ruggedly designed and ensure working comfort. An
anti-stab plate is integrated into the seat back to reduce the risk of
officer injury. An adjustable power lumbar system is standard on the
driver's seat.
Seat belt extenders
Some police departments have begun employing the use of seat belt
extenders to make the practice of buckling and unbuckling seat belts
easier for officers wearing hip mounted radios, side arms, etc.
Seat belt extenders should never be worn when the lap strap will not
adjust snugly on the hips and/or when the intersection of the lap belt
and shoulder belt straps (measured along the lap strap) is less than six
(6) inches (15 cm) from an imaginary center line of the occupant's body.
WARNING: Do not use extensions to change the fit of the
shoulder belt across the torso.
280
2011 Crown Victoria (cro)
Owners Guide, 2nd Printing
USA (fus)