Cadillac 1994 DeVille Owners Literature page 116

Rear Window Lockout
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Press the right side of the switch to disable rear passenger window
switches. This is a useful feature when you have children as passengers.
HORN
To sound the horn, just press a corner of the air bag located in the center
of the steering wheel.
TILT WHEEL
A tilt steering wheel allows you to adjust the steering wheel before you
drive.
You can also raise it to the highest level to give your legs more room
when you exit and enter the vehicle.
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