Circuit board assembly for a control device of a motor vehicle, comprising a multilayer circuit board and a plug connector having a housing panel. The circuit board comprises conductor tracks for forwarding signals, and a first section, a second section, and a bendable third section formed between the first section and the second section, and which has a lower stiffness than the first and the second section and connects these in such a way that a first plate centre plane of the first section makes an angle φ with a second plate centre plane of the second section. The plug connector comprises a plurality of connecting elements, each comprising a connection part and a contact pin, wherein the connection parts are electrically and mechanically connected to the second section. The housing panel comprises a first and a second plate-shaped side element, wherein the plate centre planes of the side elements each form an angle β with the first plate centre plane and an angle γ with the second plate centre plane. In order to prevent a change in the angle φ in a first direction of rotation, one of the two side elements comprises at least one first latching element. In addition, a second latching element is provided, in order to prevent a change in the angle φ in a second direction of rotation.