My Car has been overheating. Once I drive for a few miles the car temp. gauge begins to gradually increase to H..I began filling with the Dexos coolant for every trip, but once I arrive to my destination the coolant reservoir is empty. The fans are working. Thermostat has been replaced. Initially, there was a small leak in the coolant reservoir. No large leaks beneath the car. That was replaced. Now it seems as if the leak is now acually leaking more beneath the car. I followed the manual and started turning the heat on full blast which helps cool the car. It still overheats the heat being on just allows a longer trip before actually overheating.. ..the car is 2013, fairly new. Hoping the issue is not major

 

You have to find and repair the leak. Check the water pump, the hoses, radiator, etc. Is the car still under warranty? If so let the dealer repair it.