Subaru Forester: Connecting a trailer / Side mirrors

After hitching a trailer to your vehicle,
check that the standard side mirrors
provide a good rearward field of view
without significant blind spots. If significant
blind spots occur with the vehicle’s standard
side mirrors, use towing mirrors that
conform with Federal, state/province and/
or other applicable regulations.
CAUTION
Direct splicing or other improper
connection of trailer lights may
damage your vehicle’s electrical
system and cause a malfunction of
your vehicle’s lighting system...
Other information:
In any of the following cases, the Auto
Start Stop system will not operate.
When the Auto Start Stop warning light/
Auto Start Stop OFF indicator light (yellow)
is illuminating or flashing.
When the malfunction indicator light
(Check Engine light) is illuminating...
Use windshield washer fluid. If windshield
washer fluid is unavailable, use clean
water.
In areas where water freezes in winter, use
an anti-freeze type windshield washer
fluid.
If you fill the reservoir tank with a fluid with
a different concentration from the one
used previously, purge the old fluid from
the piping between the reservoir tank and
washer nozzles by operating the washer
for a certain period of time...