A plug connection includes a first plug connector, a second plug connector which can be inserted in the first plug connector, and a detent spring fastened to the first plug connector. The detent spring engages in a groove of the second plug connector when a second plug connector is inserted. The detent spring can be moved from a locked position into an unlocked position. In the locked position the detent spring is prevented from effecting a movement radially outwards into an unlocked position. In the unlocked position the movement of the detent spring radially outwards is unblocked. A release device which can be selectively activated is provided on the first plug connector. The activated release device holds the detent spring in the unlocked position.