Abstract: A quick connector includes a housing having a receiving chamber for receiving, in a fluid-tight manner, a connecting piece, the receiving chamber transitioning into a line portion for conveying a fluid. A sealing chamber, which surrounds at least parts of the circumference of the receiving chamber and has at least one sealing ring arranged in the sealing chamber. A closure unit for locking the at least one sealing ring in the sealing chamber. The closure unit includes a sleeve, which delimits at least parts of the sealing chamber and has at least one arm extending from the sleeve, which arm is designed to lock the closure unit on the housing.

Abstract: A plug connector includes a housing, a locking element and a verification element. The housing has a receiving chamber, a connection piece and a duct through which fluid can flow. The locking element is movable between an open position and a fastening position, a plug can be inserted in the receiving chamber in the open position of the locking element, and a plug inserted in the receiving chamber can be fastened within the receiving chamber via the locking element in the fastening position of the locking element. In an open position of the locking element, the verification element is at least partially covered by the locking element, and in a fastening position of the locking element, the verification element can be read.