Cadillac 2006 STS - Manual (Page 12)

Head Restraints
The front and rear head
restraints lock into place
when raised. To release
the head restraint and
lower it, press the
tab located at the base
of the restraint.
The front head restraints also tilt forward and rearward.
Adjust your head restraint so that the top of the restraint
is closest to the top of your head. This position reduces
the chance of a neck injury in a crash.
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