Method for transmitting message content by means of a plurality of broadcast messages to cover a geographical area, wherein a transmitter transmits at least one initial broadcast message, wherein the message content is sent from the transmitter to a plurality of receivers (31, 32, 33) as a broadcast message by means of D2D functionality, device-to-device functionality or a PC5 sidelink functionality, in particular using the Mode 4 functionality, wherein the transmitter comprises a radio coverage area, within which it is possible for the receivers (31, 32, 33) to receive sent broadcast messages, wherein the method for covering the geographical area comprises the following steps: - in a first step, the transmitter sends the initial broadcast message comprising the message content and initial additional information, and a first receiver (31, 32, 33) receives the initial broadcast message, wherein the initial additional information comprises at least the following: - message identification information, - positional information regarding the transmitter, - area information for defining the geographical area, and - validity time information - in an subsequent second step, the receivers (31, 32, 33) - as further transmitters - each send further broadcast messages, wherein the further broadcast messages comprise the message content and respective further additional information regarding the coverage of the geographical area, wherein the receivers (31, 32, 33) check, in a first sub-step of the second step, using the received validity time information, whether the message content of the received broadcast message is still valid, wherein at least some of the receivers (31, 32, 33) - in a second sub-step of the second step and acting as further transmitters - each send further broadcast messages provided that the message content of the received broadcast message is still valid, wherein in order to reduce the number of broadcast messages, the receivers (31, 32, 33) check, prior to performing the second sub-step of the second step, whether a remaining area of the geographical area is reduced by the re-sending of the broadcast message, wherein the remaining area corresponds to a not-yet-covered part of the geographical area detected or determined by the receivers (31, 32, 33), wherein the receivers (31, 32, 33) perform the second sub-step of the second step only when the check produces a result. - in a first step, the transmitter sends the initial broadcast message comprising the message content and initial additional information, and a first receiver (31, 32, 33) receives the initial broadcast message, wherein the initial additional information comprises at least the following: - message identification information, - positional information regarding the transmitter, - area information for defining the geographical area, and - validity time information - message identification information, - positional information regarding the transmitter, - area information for defining the geographical area, and - validity time information - in an subsequent second step, the receivers (31, 32, 33) - as further transmitters - each send further broadcast messages, wherein the further broadcast messages comprise the message content and respective further additional information regarding the coverage of the geographical area, wherein the receivers (31, 32, 33) check, in a first sub-step of the second step, using the received validity time information, whether the message content of the received broadcast message is still valid, wherein at least some of the receivers (31, 32, 33) - in a second sub-step of the second step and acting as further transmitters - each send further broadcast messages provided that the message content of the received broadcast message is still valid,