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:
When the procedure to disable the functions
is performed again, a chirp will
sound, and the functions are enabled.
NOTE
The keyless access function will be
enabled only if you perform the procedure
in the same manner used to
disable the function (for example, when
disabling by operating the driver’s
door, the function will not be enabled
even if you operate the access key fob)...
Turning ON or OFF
Press and hold the dedicated Parking Safety control button () for more than 2 seconds to manually switch the Reverse Parking Collision-Avoidance Assist system ON or OFF...