A plug connector assembly includes first and second connector housings, a rotary lever, and a slide. The rotary lever has side faces each having a guide path into which in each case a guide pin on the second connector housing is inserted and is displaced along the guide path by rotation of the rotary lever whereby the connector housings move toward one another and electrical contact elements thereof connect. The slide is movable on the second plug connector housing. A driver element of the rotary lever cooperates in a form-fit manner with a driver element of the slide when the rotary lever rotates causing the slide to linearly move. A locking element of the slide is displaced relative to a locking element of the first connector housing when the slide linearly moves whereby a form-fit locking action between the locking elements may be established or cancelled.