If you've accidently put the wrong fuel in your vehicle (petrol in a diesel tank/diesel in a petrol tank), don't turn on the ignition or start the engine. This will circulate the contaminated fuel and increase the risk of damage to your vehicle.
Your vehicle should be towed to your nearest Hyundai Service Centre. The contaminated fuel will need to be removed and replaced with clean fuel before the vehicle can be started. If you are covered by Hyundai Roadside Assist, please call 1800 186 306 to arrange a tow.