The invention relates to a vehicle having an air conditioning system for heating inlet air (I) flowing into the vehicle interior (2), said system comprising a heater heat exchanger (8), which is thermally coupled via a coolant circuit (13) to a drive assembly or the like, and an additional heat exchanger (7) which is connected into a coolant circuit of the air conditioning system and in heating mode emits heat to the inlet air (I). According to the invention the additional heat exchanger (7) is at least of double-row design having a first heat exchanger row (30) and a second heat exchanger row (31), and in the air flow direction the two heat exchanger rows (30, 31) are configured so that in the first heat exchanger row (31) an undercooling of the condensed coolant takes place and in the second heat exchanger row (30) at least a removal of heat and optionally condensation of the coolant takes place.