2006 Cadillac STS-V Owner's 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. 1-6