To set vehicle to vehicle distance:

This function allows you to program the vehicle to maintain a relative distance to the vehicle ahead without depressing the accelerator pedal or brake pedal.
The vehicle to vehicle distance will automatically activate when the smart cruise control system is on. Select the appropriate distance according to road conditions and vehicle speed.
Each time the button is pressed, the vehicle to vehicle distance changes as follows:

For example, if you drive at 90 km/h (56 mph), the distance maintained is as follows:
Distance 4 - approximately 52.5 m (172 ft)
Distance 3 - approximately 40 m (131 ft)
Distance 2 - approximately 32.5 m (107 ft)
Distance 1 - approximately 25 m (82ft)
✽ NOTICE
The distance is set to the last set distance when the system was used after starting the engine.
When the lane ahead is clear :

The vehicle speed will maintain the set speed.
WARNING - Following Distance
When there is a vehicle ahead of you in your lane :

CAUTION

If the vehicle ahead (vehicle speed: less than 30 km/h (20 mph) disappears to the next lane, the warning chime will sound and a message will appear. Adjust your vehicle speed for vehicles or objects that can suddenly appear in front of you by depressing the brake pedal according to the road and driving conditions ahead.
Press the CRUISE button. (the CRUISE indicator in the instrument cluster will go off). When the Smart Cruise Control System is not needed, press the [CRUISE] switch and deactivate the system.
The sensor detects the distance to the vehicle ahead. If the sensor is covered with dirt or other foreign matter, the vehicle to vehicle distance control may not operate correctly.
Tire care For proper maintenance, safety, and maximum fuel economy, you must always maintain recommended tire inflation pressures and stay within the load limits and weight distribution recommended for your vehicle. Recommended cold tire inflation pressures All tire pressures (including the spare) should be checked when the tires
Tire specification and pressure label The tires supplied on your new vehicle are chosen to provide the best performance for normal driving. The tire label located on the driver's side center pillar gives the tire pressures recommended for your vehicle.