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:
Driver Monitoring System is introduced as
DriverFocus in some countries.
The Driver Monitoring System monitors
possible cases when the driver is not
paying attention to the forward direction,
and also recognizes individual users.
This system warns the driver of inattentive/
drowsy driving, and can support safe and
comfortable driving by automatically retrieving
the following settings...
A passenger detection sensor is built into the front passenger seat cushion.
An electronic control unit evaluates occupant information and determines whether the front passenger air bag should be activated or deactivated.
The overhead console displays the PASSENGER AIR BAG OFF () indicator whenever the front passenger air bag has been switched off by the system...