Hyundai Sonata LF Owner's Manual page 461

Driving your vehicle
Engine Stop/Start button positions
- Vehicle with automatic transaxle
Button Position
OFF
To turn off the engine, press the Engine
Start/Stop button with shift lever in P (Park).
When you press the Engine Start/Stop but-
ton without the shift lever in P (Park), the
Engine Start/Stop button does not turn to
the OFF position, but turns to the ACC posi-
tion.
The steering wheel locks to protect the vehi-
cle from theft.
ACC
Press the Engine Start/Stop button when
the button is in the OFF position without
depressing the brake pedal.
Electrical accessories are usable.
The steering wheel unlocks.
5-12
Action Notice
If the steering wheel is not locked properly
when you open the driver's door, the warning
chime will sound.
• If you leave the Engine Start/Stop button in
the ACC position for more than one hour,
the battery power will turn off automatically
to prevent the battery from discharging.
• If the steering wheel doesn't unlock proper-
ly, the Engine Start/Stop button will not
work. Press the Engine Start/Stop button
while turning the steering wheel right and
left to release tension.