Saturn 2009 ASTRA - Manual (Page 118)

Rear Reading Lamps
The rear seat reading lamps can be
turned on while the ignition is on.
9 (Off): Press to turn the lamp off.
R (On): Press to turn the lamp on.
Trunk Lamp
The trunk lamp comes on when the
trunk is opened and turns off
when the trunk is closed.
Battery Run-Down
Protection
This feature helps prevent the
battery from being drained, if the
courtesy lamps, reading lamps, sun
visor, glovebox or rear compartment
lamp are left on. If any of these
lamps are left on, they automatically
turn off after approximately
20 minutes, if the ignition is off.
5-4 Lighting