Abstract: The invention relates to an open motor vehicle such as a convertible, roadster or the like, which has a vehicle body, a drive device with internal combustion engine, gearbox and exhaust system, a vehicle interior with at least one vehicle seat with backrest and headrest and a fresh-air/heating device. In order to increase the air-conditioning comfort when driving with the top down and in order to improve the sense of well-being of the vehicle occupants, the fresh-air/heating device has at least one air vent which is provided in the vehicle interior behind the at least one vehicle seat, and at least one air duct which is connected to the air vent and to which air which has been heated by the waste heat of the drive device can be fed.