Fastening construction, exterior vision unit of a motor vehicle and method for assembling or disassembling a fastening construction

A method for assembling or disassembling a fastening construction, comprising:

• providing a base part comprising a shaft extending in an axial direction, wherein the shaft has an axial contact element which is at least partially oriented in the axial direction, a spring arranged on the shaft surrounding an outer radial surface of the shaft and a positioning element arranged on the shaft so that the positioning element contacts a first axial end of the spring with a first portion;
• compressing a subassembly including the spring and the positioning element so that the axial contact element is accessible;
• placing or removing a locking element on the shaft positioned so that a first contact portion of the locking element contacts the axial contact element of the shaft, wherein the locking element has an at least partially annular shape which contacts the axial contact element of the shaft along its circumference;
• and
• releasing the subassembly of the spring and the positioning element so that the spring biases the positioning element in the axial direction such that, when the locking element is in place on the shaft, a second portion of the positioning element contacts a second contact portion of the locking element in the axial direction, wherein the second contact portion of the locking element and the second contact of the positioning element are configured so as to transmit a force of the spring acting on the positioning element in a direction that is inclined radially inwards from the axial direction onto the locking element to bias the locking element against the axial contact element in a direction that is inclined radially inwards from the axial direction.