With the door lock button:

✽ NOTICE
If a power door lock ever fails to function while you are in the vehicle try one or more of the following techniques to exit: Operate the door unlock feature repeatedly (both electronic and manual) while simultaneously pulling on the door handle. Operate the other door locks and handles, front and rear. Lower a front window and use the mechanical key to unlock the door from outside.
With the central door lock switch:

When pressing the front portion (1) of the switch, all vehicle doors will lock.
When pressing the rear portion (2) of the switch, all vehicle doors will unlock.
WARNING
The doors should always be fully closed and locked while the vehicle is in motion. If the doors are unlocked, the risk of being thrown from the vehicle in a crash is increased.
WARNING
Do not leave children or animals unattended in your vehicle. An enclosed vehicle can become extremely hot, causing death or serious injury to unattended children or animals who cannot escape the vehicle. Children might operate features of the vehicle that could injure them, or they could encounter other harm, possibly from someone gaining entry to the vehicle.
WARNING
Always secure your vehicle.
Leaving your vehicle unlocked increases the potential risk to you or others from someone hiding in your vehicle. To secure your vehicle, while depressing the brake, move the shift lever to the P (Park) position, engage the parking brake, and place the ignition switch in the LOCK/OFF position, close all windows, lock all doors, and always take the key with you.
WARNING
Opening a door when something is approaching may cause damage or injury. Be careful when opening doors and watch for vehicles, motorcycles, bicycles or pedestrians approaching the vehicle in the path of the door.
Smart key
Auto door lock/unlock featuresHyundai Tucson (LM) 2010-2015 Owners Manual: 150,000 miles (240,000 km) or 120 months
Rotating tires
Inspect vacuum hose
Inspect air conditioning refrigerant
Inspect brake hoses and lines
Inspect drive shafts and boots
Inspect exhaust pipe and muffler
Inspect front brake disc/pads, calipers
Inspect propeller shaft (AWD)
Inspect rear brake disc/pads
Inspect steeri ...
Hyundai Tucson (LM) 2010-2015 Service Manual: Description and Operation
Description
Exhaust emissions (CO, HC, NOx) are controlled by a
combination of engine modifications and the addition of special control
components.
Modifications to the combustion chamber, intake manifold, camshaft and ignition system form the basic control system.
These items have been int ...