The contact owns a 2023 Jeep Grand Cherokee L. The contact stated that while the daytime running lights were activated, the high-beam headlights were inoperable. The contact had to turn off the daytime running lights for the high-beam headlights to engage. There were no warning lights illuminated. The vehicle was taken to the local dealer, who was unable to determine the cause of the failure. The vehicle was not diagnosed or repaired. The contact called another local dealer, Chapman Las Vegas Dodge Chrysler Jeep Ram (3470 Boulder Hwy, Las Vegas, NV 89121) and was informed that the vehicle was working as designed. The vehicle was not diagnosed or repaired. The manufacturer was contacted, but no additional assistance was provided. The failure mileage was unknown.