Subaru Forester: Warning and indicator / Windshield washer fluid warning light

This light illuminates when the fluid level in
the windshield washer fluid tank decreases
to the lower limit (approximately
0.6 US qt, 0.6 liter, 0.5 Imp qt).
If this light illuminates when the engine is
running, it may indicate that the transmission
fluid temperature is too hot.
If the light illuminates while driving, immediately
stop the vehicle in a safe place
and let the engine idle until the warning
light turns off...
Other information:
..
Battery: Button battery CR1620 or
equivalent
Wrap a flat-head screwdriver with vinyl
tape or a cloth. Open the key head using a
flat-head screwdriver.
Remove the transmitter case from the
key head.
Open the transmitter case by releasing
the hooks...