An electric plug-and-socket connection, including a first plug part, in particular a cable harness plug, having a locking slide which can be moved from an initial position into an end position and having another plug part into which the first plug part can be inserted to establish an electric plug-and-socket connection. To prevent the locking slide from assuming its end position before being connected to the other plug part, latching elements provided on the side of the first plug part work together with the locking slide so that they latch with the locking slide in its initial position. By connecting to the other plug part, pins engage in the latching elements in such a way that the latching elements are disengaged and the locking slide can be brought into its end position after connecting the first plug part.