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Illuminated engine start/stop button

Whenever the front door is opened, the engine start/stop button will illuminate for your convenience. The light will go off after about 30 seconds when the door is closed.
When all doors are closed and you lock the vehicle by using the transmitter or the smart key, the light will go off immediately.
Kia Stinger (CK) 2018-2023 Owner's Manual: ISG (Idle Stop and Go) system
Your vehicle may be equipped with the ISG system, which reduces fuel consumption by automatically shutting down the engine, when the vehicle is at a standstill. (For example : red light, stop sign and traffic jam) The engine starts automatically as soon as the starting conditions are met. The ISG system is ON whenever the engine is running. ✽ NOTICE When the engine automatically starts by the ISG system, some warning lights (ABS, ESC, ESC OFF, EPS or Parking brake warning light) may turn on for a few seconds.Kia Stinger (CK) 2018-2023 Owner's Manual: Care of seat belts
Seat belt systems should never be disassembled or modified. In addition, care should be taken to assure that seat belts and belt hardware are not damaged by seat hinges, doors or other abuse. WARNING - Pinched seat belt Make sure that the webbing and/or buckle does not get caught or pinched in the rear seat when returning the rear seatback to its upright position.