Abstract: The present application relates to a method for connecting plug parts of an electrical plug-in connector, in which on a first plug part a hollow cylindrical retaining sleeve is disposed movably in axial direction relative to the first plug part, wherein the retaining sleeve is retained in a first position biased by a bias spring and the axial relative movement is effected against the spring force, and upon connecting the plug parts, a spring element disposed on the second plug part is pressed radially outwards in a connecting intermediate state, upon further axially pushing together the plug parts, the retaining sleeve is displaced axially backwards from the first position by the spring element, and upon further pushing together the plug parts, the spring element snaps radially inwards into a recess and the backward displacement of the retaining sleeve by the spring element is terminated and the retaining sleeve is automatically again brought into the first position by the bias spring, wherein the spring elem

Abstract: The invention relates to a plug-in connector comprising a first and a second plug part which can be reversibly coupled and disconnected in a bayonet manner with axial and rotational movements, wherein a connection device is designed that has at least one spring element, at least one spring piece of which engages with a sliding guide in the second plug part in order to connect the plug parts. The sliding guide and the spring element are designed such that the plug parts are automatically disconnected when a release threshold value is exceeded. A raised release element which is embraced by the spring piece in the plugged state of the plug parts is formed on the sliding guide.