Locking system having: a door frame, which has a first bearing limb with a first bearing through-hole and a second bearing limb with a second bearing through-hole; an eccentric bearing bolt with a first bearing end and a second bearing end, wherein the first bearing end is designed to be accommodated in the first bearing through-hole and a second bearing end is designed to be accommodated in the second bearing through-hole, wherein the bearing bolt has a central cylinder between the two bearing ends (9a, 9b), the central cylinder being designed eccentrically in relation to a longitudinal axis of the bearing bolt, said axis leading through the two bearing ends (9a, 9b); wherein the bearing bolt has a first external toothing ring at the first bearing end and a second external toothing ring on the central cylinder; an eccentric bearing bushing with a central through-passage, which is designed to accommodate the central cylinder of the bearing bolt for sliding action, and with a lateral cylinder surface, which surrounds the central through-passage eccentrically, wherein the central through-passage has a first internal toothing ring, which is designed to complement the second external toothing ring of the bearing bolt; a fastening disc, which is designed for fastening on the first bearing limb and with a through-hole for accommodating the first bearing end of the bearing bolt, wherein the fastening disc has a second internal toothing ring in the through-hole, the second internal toothing ring being designed to complement the first external toothing ring of the bearing bolt; a catch sleeve, which is designed to accommodate the bearing bushing for sliding action; and a vehicle door, which has a catch which is designed to be swung around the catch sleeve for the purpose of locking the vehicle door to the door frame. a door frame, which has a first bearing limb with a first bearing through-hole and a second bearing limb with a second bearing through-hole; an eccentric bearing bolt with a first bearing end and a second bearing end, wherein the first bearing end is designed to be accommodated in the first bearing through-hole and a second bearing end is designed to be accommodated in the second bearing through-hole, wherein the bearing bolt has a central cylinder between the two bearing ends (9a, 9b), the central cylinder being designed eccentrically in relation to a longitudinal axis of the bearing bolt, said axis leading through the two bearing ends (9a, 9b); wherein the bearing bolt has a first external toothing ring at the first bearing end and a second external toothing ring on the central cylinder; an eccentric bearing bushing with a central through-passage, which is designed to accommodate the central cylinder of the bearing bolt for sliding action, and with a lateral cylinder surface, which surrounds the central through-passage eccentrically, wherein the central through-passage has a first internal toothing ring, which is designed to complement the second external toothing ring of the bearing bolt; a fastening disc, which is designed for fastening on the first bearing limb and with a through-hole for accommodating the first bearing end of the bearing bolt, wherein the fastening disc has a second internal toothing ring in the through-hole, the second internal toothing ring being designed to complement the first external toothing ring of the bearing bolt; a catch sleeve, which is designed to accommodate the bearing bushing for sliding action; and a vehicle door, which has a catch which is designed to be swung around the catch sleeve for the purpose of locking the vehicle door to the door frame.