Abstract: An electrical plug-and-socket connection is described. The electrical plug-and-socket connection having a plug and a plug connector, in particular for receiving a cable harness plug. The plug connector includes a housing provided with a plug connector opening in which a plurality of pin contacts directed toward the plug connector opening are provided for establishing an electrical contact. The plug connector further includes a protective device which has at least one opening for the passage of a pin contact and can be latched in a protective position using at least one latch element. The protective device can be brought from the protective position into an assembly position by joining the plug connector with the plug. At least one contact element, which works together with the latch element and releases the latch connection between the plug and the plug connector as the plug is attached to the plug connector is provided on the plug for actuating the protective device.