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:
If the vehicle is switched to the OFF or ACC position while the headlamps are on, both the headlamps and position lamps will remain illuminated for approximately five minutes, helping light your path after leaving the vehicle.
After the vehicle is turned off, opening and then closing the driver's door will cause the headlamps and position lamps to switch off automatically after approximately 15 seconds...
This warning indicator appears when the
BSD/RCTA is malfunctioning. In this case
the BSD/RCTA warning light will be shown
on the combination meter display (color
LCD). When this indicator appears, have
your vehicle inspected by your SUBARU
dealer as soon as possible...