The fuel filler cap can be opened from inside the vehicle by pulling up on the fuel filler cap release lever located at the front of the floor on the left side of the vehicle.
Note: If you cannot open the fuel filler cap due to ice, lightly tap or press on the cap to break the ice and open the cap. If necessary, use an approved de-icing spray (do not use engine coolant) or move the vehicle to a heated area until the ice melts.
Warning: Gasoline vapors are poisonous. Always turn off the engine before refueling. When handling fuel, make sure there is no open flame nearby. If the filler cap needs to be replaced, install only a genuine HYUNDAI filler cap designed for your vehicle.
Sometimes, when you open the cap in high ambient temperatures, you may hear a slight "hissing" sound. This is normal and is not a cause for concern. When opening the fuel filler cap, always turn it slowly.
The basis of the material is information from the website: HYUNDAIBOOK.RU