Subaru Forester: Warning and indicator / Low fuel warning light

The low fuel warning light illuminates when
the tank is nearly empty, at approximately
2.5 US gal (9.5 liters, 2.1 Imp gal). It only
operates when the ignition switch is in the
“ON” position.
CAUTION
Promptly put fuel in the tank whenever
the low fuel warning light
illuminates. Engine misfires as a
result of an empty tank could cause
damage to the engine.
The warning light illuminates if any door or
the rear gate is not fully closed. This
function is effective even if the ignition
switch is in the “LOCK”/“OFF” or “ACC”
position, or the key is removed from the
ignition switch...
Other information:
Carry some emergency equipment, such
as a window scraper, a bag of sand, flares,
a small shovel and jumper cables.
Check the battery and cables. Cold temperatures
reduce battery capacity. The
battery must be in good condition to
provide enough power for cold winter
starts...
Chemicals, salts and gravel used for
deicing road surfaces are extremely corrosive,
accelerating the corrosion of underbody
components, such as the exhaust
system, fuel and brake lines, brake cables,
floor pan and fenders, and suspension.
Thoroughly flush the underbody and inside
of the fenders with lukewarm or cold water
at frequent intervals to reduce the harmful
effects of such agents...