Alfa Romeo 159 Owner's Handbook Manual page 80

In the following table are summarised the causes that make front/rear ceiling lights turn on/off and their turning on/off
mode:
Cause
Opening one of the front/rear doors
Closing all the doors
Removing the electronic key from the ignition device
Locking the doors
Unlocking the doors
Cutting in of the fuel cut-off switch
In all the cases tabulated above, front and rear ceiling lights turning on/off is gradual, for 2 seconds.
Front and rear ceiling lights turning on/off mode
Central front light and rear light turning on for a few minutes.
This timed operation will be reactivated each time a door is opened.
With electronic key removed from ignition device: ceiling lights
will stay on for other 10 seconds. This timed operation
is stopped when refitting the electronic key into the ignition
device
Starting the engine: front central and rear courtesy lights will
turn off
Front central and rear courtesy lights turning on for about
10 seconds
Front central and rear courtesy lights turning off
Front central and rear courtesy lights turning on for about
10 seconds
Front central and rear courtesy lights turning on for a few
minutes. Reactivating the fuel cut-off switch will turn off the
ceiling lights
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