Hyundai Sonata: Smart key

With a smart key, you can lock or unlock a door (and trunk) and even start the engine without inserting the key.
The functions of buttons on a smart key are similar to the remote keyless entry. (Refer to the “Remote keyless entry” in this section.)
Immobilizer system
Your vehicle is equipped with an electronic engine immobilizer system to reduce
the risk of unauthorized vehicle use.
Your immobilizer system is comprised of a small transponder in the ignition key ...
Smart key functions
Carrying the smart key, you may lock and unlock the vehicle doors. Also, you
may start the engine. Refer to the following, for more details.
Locking
Using the door handle switch
Pressing ...
See also:
Good driving practices
Never move the gear shift lever from P (Park) or N (Neutral) to any other
position with the accelerator pedal depressed.
Never move the gear shift lever into P (Park) when the vehicle is in mo ...
Specifications - Revised
Specifications
Description
Specifications
Limit
General
Type
In-line, DOHC
Numbe ...
To increase cruise control set speed
Follow either of these procedures:
Push the RES+ switch and hold it. Your vehicle will accelerate. Release
the switch at the speed you want.
Push the RES+ switch and release it immediatel ...
