Locking wedge system for releasably coupling a vehicle flap to a structural part of a vehicle body, comprising - a locking wedge module with two locking wedges (2.1, 2.2), which are mounted displaceably with respect to one another in perpendicular direction to an axis of symmetry, with a respective wedge edge (2.10, 2.20) and with a locking wedge holder (2.3) for displaceably receiving the locking wedges (2.1, 2.2), and - a retaining jaw module with two retaining jaws (3.1, 3.2), which receive the locking wedge module between them, with a respective wedge groove (3.11, 3.21), wherein a force fit is produced between the locking wedges (2.1, 2.2) and the retaining jaws (3.1, 3.2) by moving the locking wedges (2.1, 2.2) apart, wherein - a wedge edge (2.10, 2.20) of at least one locking wedge (2.1, 2.2) and the wedge groove (3.11, 3.21) of a retaining jaw (3.1, 3.2) that receives said wedge edge (2.10, 2.20) are designed to extend at an inclination with respect to the axis of symmetry of the locking wedges (2.1, 2.2) and the retaining jaws (3.1, 3.2), characterised in that - the retaining jaw module is designed with guide rails (3.10, 3.20) to guide a displacement unit between a locked position bridging the retaining jaws (3.1, 3.2) and an open position bridging the guide rails (3.10, 3.20) and allowing the receiving of the locking wedge module, - the displacement unit is formed of at least two strip-shaped plate elements (4.1, 4.2), which are connected pivotably against each other in an overlapping fan-like manner by means of a pivot axis (4.14) arranged at one end of the plate elements (4.1, 4.2), and - the displacement unit is designed with a spring element (4.3), with which the plate elements (4.1, 4.2) are fanned out when displaced from the open position between the guide rails (3.10, 3.20) into the locked position between the retaining jaws (3.1, 3.2). - a locking wedge module with two locking wedges (2.1, 2.2), which are mounted displaceably with respect to one another in perpendicular direction to an axis of symmetry, with a respective wedge edge (2.10, 2.20) and with a locking wedge holder (2.3) for displaceably receiving the locking wedges (2.1, 2.2), and - a retaining jaw module with two retaining jaws (3.1, 3.2), which receive the locking wedge module between them, with a respective wedge groove (3.11, 3.21), wherein a force fit is produced between the locking wedges (2.1, 2.2) and the retaining jaws (3.1, 3.2) by moving the locking wedges (2.1, 2.2) apart, wherein - a wedge edge (2.10, 2.20) of at least one locking wedge (2.1, 2.2) and the wedge groove (3.11, 3.21) of a retaining jaw (3.1, 3.2) that receives said wedge edge (2.10, 2.20) are designed to extend at an inclination with respect to the axis of symmetry of the locking wedges (2.1, 2.2) and the retaining jaws (3.1, 3.2), - the retaining jaw module is designed with guide rails (3.10, 3.20) to guide a displacement unit between a locked position bridging the retaining jaws (3.1, 3.2) and an open position bridging the guide rails (3.10, 3.20) and allowing the receiving of the locking wedge module, - the displacement unit is formed of at least two strip-shaped plate elements (4.1, 4.2), which are connected pivotably against each other in an overlapping fan-like manner by means of a pivot axis (4.14) arranged at one end of the plate elements (4.1, 4.2), and - the displacement unit is designed with a spring element (4.3), with which the plate elements (4.1, 4.2) are fanned out when displaced from the open position between the guide rails (3.10, 3.20) into the locked position between the retaining jaws (3.1, 3.2).