Media coupling, - wherein the media coupling has a fixed part and a loose part, - wherein the loose part can be moved from a disconnection position to a connection position by moving towards the fixed part in a joining direction (z) and can be moved from the connection position to the disconnection position by moving away from the fixed part counter to the joining direction (z), - wherein the loose part is disconnected from the fixed part in the disconnection position and is connected to the fixed part in the connection position, - wherein the fixed part and the loose part have, at their sides which face one another in the connection position, main positioning aids (4, 5) which interact with one another and by way of which the loose part is positioned relative to the fixed part as it moves from the disconnection position to the connection position as viewed transversely in relation to the joining direction (z), - wherein the fixed part and the loose part each have a number of support surfaces (6, 7), - wherein the support surfaces (6, 7) on the fixed part and the loose part are arranged in an immovable manner at least in the joining direction (z) and preferably also transversely to the said joining direction, - wherein in each case one duct for guiding a gaseous medium opens out in at least one support surface of the fixed part and the corresponding support surface of the loose part, characterized - in that the number of support surfaces (6, 7) of the fixed part and of the loose part is precisely three in each case, - in that the support surfaces (6, 7) of the fixed part and of the loose part each form a triangle, and - in that either the fixed part and the loose part bear against one another solely by way of their in each case three support surfaces (6, 7) in the connection position or the fixed part and the loose part bear against one another, in addition to their in each case three support surfaces (6, 7), also by way of a number of further elements (8 to 11) in the connection position, but the further elements (8 to 11) are arranged in a yielding manner at least in the joining direction (z) on the fixed part and/or on the loose part. - wherein the media coupling has a fixed part and a loose part, - wherein the loose part can be moved from a disconnection position to a connection position by moving towards the fixed part in a joining direction (z) and can be moved from the connection position to the disconnection position by moving away from the fixed part counter to the joining direction (z), - wherein the loose part is disconnected from the fixed part in the disconnection position and is connected to the fixed part in the connection position, - wherein the fixed part and the loose part have, at their sides which face one another in the connection position, main positioning aids (4, 5) which interact with one another and by way of which the loose part is positioned relative to the fixed part as it moves from the disconnection position to the connection position as viewed transversely in relation to the joining direction (z), - wherein the fixed part and the loose part each have a number of support surfaces (6, 7), - wherein the support surfaces (6, 7) on the fixed part and the loose part are arranged in an immovable manner at least in the joining direction (z) and preferably also transversely to the said joining direction, - wherein in each case one duct for guiding a gaseous medium opens out in at least one support surface of the fixed part and the corresponding support surface of the loose part, characterized - in that the number of support surfaces (6, 7) of the fixed part and of the loose part is precisely three in each case, - in that the support surfaces (6, 7) of the fixed part and of the loose part each form a triangle, and - in that either the fixed part and the loose part bear against one another solely by way of their in each case three support surfaces (6, 7) in the connection position or the fixed part and the loose part bear against one another, in addition to their in each case three support surfaces (6, 7), also by way of a number of further elements (8 to 11) in the connection position, but the further elements (8 to 11) are arranged in a yielding manner at least in the joining direction (z) on the fixed part and/or on the loose part.