Oldsmobile 1998 Aurora Owner's Manual page 114

Rear Reading Lamps
These lamps go on when you open the doors. You can
also turn them on by pressing the button to the side of
the lamp. Press it again to turn them off.
Trunk Lamp
When you open the trunk to its full open position, a
lamp will come on inside the trunk. This lamp will
automatically turn off when the trunk is closed.
Inadvertent Load Protection
This feature automatically shuts off the interior lamps
if any are left on for more than 10 minutes when the
ignition is off or a door is left open. This will keep your
battery from running down.
Mirrors
Electrochromic Daymight Rearview Mirror
with Compass (If Equipped)
Your vehicle may have an electrochromic inside
rearview mirror with a compass.