Jeep 2013 Wrangler - Manual (Page 114)

Outside Mirrors
To receive maximum benefit, adjust the outside mirror(s)
to center on the adjacent lane of traffic with a slight
overlap of the view obtained on the inside mirror.
WARNING!
Vehicles and other objects seen in the passenger side
convex mirror will look smaller and farther away
than they really are. Relying too much on your
passenger side mirror could cause you to collide with
another vehicle or other object. Use your inside
mirror when judging the size or distance of a vehicle
seen in the passenger side mirror.
Outside Rearview Mirror
112 UNDERSTANDING THE FEATURES OF YOUR VEHICLE