To resume cruising speed at more than approximately 25 mph (40 km/h)

If any method other than the CRUISE ONOFF switch was used to cancel cruising speed and the system is still activated, the most recent set speed will automatically resume when the RES/+ switch is pushed. It will not resume, however, if the vehicle speed has dropped below approximately 25 mph (40 km/h)
See also:
ADVANCED STANDARD SAFETY TECHNOLOGIES: PART OF HYUNDAI'S ASSURANCE
COMMITMENT
Hyundai Sonata is built from the ground up with safety in mind, with a hot
stamped ultra-high-strength steel body structure, advanced airbag technology and
Electronic Stability Control (ESC), deli ...
SAFETY
The Elantra has two sets of lower Latch anchors in the second row's outboard
seats. While they're buried in the seat cushions, they're not impossible to
reach.
My younger son, who uses a booster ...
Resetting the sunroof
Whenever the vehicle battery is disconnected or discharged, you have to reset
your sunroof system as follows:
1. Turn the ignition key to the "ON" position.
2. Press the TILT UP button f ...


