Connecting device and method for connecting two parts

A connecting device for connecting two parts, comprising:

• a first connecting element which is arrangeable on a first part and a second connecting element which is arrangeable on a second part,
• wherein at least one of the first connecting element and the second connecting element comprises one or more non-self-cutting retaining projections, each of which has a curved supporting surface that is in the form of an arc of a circle in longitudinal section,
• wherein the one or more retaining projections are introducible into a groove having a curved undercut surface and is in the form of an arc of a circle in longitudinal section,
• wherein the one or more retaining projections are configured to engage in the groove,
• wherein the first connecting element and the second connecting element are configured to provide a connection plane between the two parts to be connected when the first connecting element is engaged with the second connecting element;
• wherein the connecting device forms a guidance device configured for guiding the two parts relative to each other, wherein the first connecting element comprises a guidance groove and wherein the second connecting element comprises a guidance element, wherein the guidance element is linearly displaceable along the guidance groove,
• wherein the guidance groove comprises a camming guide for the guidance of the guidance element along a predetermined guide path, wherein the guide path is at varying spacings from the connection plane;
• wherein the guide path has two maximum regions having an at least local maximum spacing from the connection plane.