2010 Hyundai Elantra Owner's Manual - Page 250

What to do in an emergency 6. If you cannot find the cause of the overheating, wait until the engine temperature has returned to normal. Then, if coolant has been lost, carefully add coolant to the reservoir to bring the fluid level in the reservoir up to the halfway mark. 7. Proceed with caution, keeping alert for further signs of overheating. If overheating happens again, call an authorized Hyundai dealer for assistance. CAUTION Serious loss of coolant indicates there is a leak in the cooling system and this should be checked as soon as possible by an authorized Hyundai dealer. 6 6