OUR NEW 2020 FORD RANGER XLT LISTED A FEATURE CALL PRE-COLLISION ASSIST W/AEB. THE TRUCK DID NOT GIVE A WARNING NOR DID IT APPLY THE BRAKES AUTOMATICALLY. NOTHING OCCURRED BEFORE WE RAN INTO THE REAR END OF THE CAR IN-FRONT OF US. THE CAR AHEAD WAS STOPPED AT A TRAFFIC LIGHT AND WE RAN INTO THE REAR END AT ABOUT 20 MPH.