A method remotely activates an air-conditioning function of a motor vehicle by a mobile communication device. This involves transmitting an activation signal by a mobile communication device to a receiver device of the motor vehicle, receiving the activation signal by the receiver device of the motor vehicle, determining a current location by a location-determining device of the motor vehicle, transferring information about the determined location from the motor vehicle to the mobile communication device, and activating the air-conditioning function of the motor vehicle if the receiver device has received a confirmation signal transmitted by the mobile communication device.