Hyundai Elantra N Owner's Manual page 390

The following objects may not be
detected:
- Sharp or slim objects, such as ropes,
chains or small poles.
- Objects, which tend to absorb
sensor frequency, such as clothes,
spongy material or snow.
- Objects smaller than 100 cm (40 in.)
in length and narrower than 14 cm
(6 in.) in diameter.
- Pedestrians, animals or objects
that are very close to the ultrasonic
sensors
Parking Distance Warning Indicators
may be displayed differently from
the actual detected location when
the obstacle is located between the
sensors.
Parking Distance Warning indicator
may not occur sequentially depending
on vehicle speed or obstacle shape.
If Reverse Parking Distance Warning
needs repair, have the vehicle
inspected by an authorized HYUNDAI
dealer.
07
7-77