If any method other than the CRUISE toggle switch was used to cancel cruising speed and the system is still activated, the cruising speed will automatically resume when you push the toggle switch up (RES+) or down (SET-).
If you push the toggle switch up (RES+), the speed will resume to the recently set speed. However, if vehicle speed has dropped below approximately 20 mph (30 km/h), it will resume when there is a vehicle in front of your vehicle.
CAUTION
Always check the road conditions when you push the toggle switch up (RES+) to resume speed.
Hyundai Sonata LF 2014-2019 Owners Manual: LCD Modes
Shift to P to edit settings
This warning message illuminates if you try to select the other User Settings
item when driving.
For safety, change the User Settings after parking the vehicle and moving the
shift lever to P (Park) position.
Quick guide (Help, if equipped)
Press and hold the OK butto ...
Hyundai Sonata LF 2014-2019 Owners Manual: Severe Driving Conditions
A- Repeatedly driving short distances of less than 5 miles (8 km) in normal temperature
or less than 10 miles (16 km) in freezing temperature
B- Extensive engine idling or low speed driving for long distances
C-Driving on rough, dusty, muddy, unpaved, graveled or saltspread roads
D-Driving in areas ...