Britax Willow S - Incompatible Vehicle Seat Belts; Seat Belt Compatibility Warnings

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The following types of vehicle seat belts are NOT compatible with
this child restraint. If any of the belt types listed below are in the
chosen seating position, choose another vehicle seating position or
check your vehicle owner’s manual for information on installing a
child restraint in your vehicle.
Motorized,
automatic
vehicle seat
belts.
Lap belts
forward of the
vehicle seat
bight.
Lap-shoulder belts
with top or bottom
anchor points on
the vehicle door.
Lap belts with a
sewn-in latch plate
that have a retractor
that locks only in case
of a sudden stop.
NOTE: 
lap-shoulder belts.
Incompatible Vehicle Seat Belts
Vehicle seats and seat belts differ from vehicle to vehicle. Refer to

vehicle seat belts and their use with child restraints.
WARNING!