 I just purchased the car last week.  When the dealer gave me the car it was suppose to be full tank and the digital gas indicator showed about little above 3/4 full.  So salesman and I drove down to the nearest gas station to fill it up to full tank as that was the dealer's policy.  But, when the salesman tried to make it full tank the pump would turn off, even though gas gauge showed it was not.  We thought it might have been the pump at the gas station.  But, after purchasing the vehicle and filling it up at another gas station, I came across the same problem, the pump would shut off even though it was not full tank.  I did some searches online and it seems this is an issues, see link: http://www.hyundai-forums.com/lf-2015-sonata-i45/306826-gas-gauge-calibration-2015-sonata-ltd.html Other than this issue, the vehicle as been good.