Mounting system for mounting a first panel to a second panel under an angle, wherein the mounting system comprises: - a bracket having a mounting portion and a head portion connected to the mounting portion via a narrowed neck portion, wherein the mounting portion, the head portion and the narrowed neck portion are flat and define a shape extending in a first plane, wherein the head portion points in an axial direction of the bracket within the first plane, wherein the mounting portion is configured for being mounted to the first panel; - a holder having an opening having a shape being defined in a further plane, the holder being configured for being mounted to the second panel, wherein the shape of the opening comprises a first part for receiving the head portion of the bracket in an unlocked position, wherein the holder and the bracket are configured such that, in operational use of the mounting system, the bracket may be inserted in the opening in such a way that the axial direction of the bracket is under an insertion angle with the further plane, wherein the shape of the opening comprises a second part adjacent to the first part and being narrower than the first part, the second part being configured for receiving the narrowed neck portion in a locking position when the bracket is slid from the first part to the second part in a direction substantially parallel to the further plane, and - a locking member for holding the bracket in the locking position after that it has been inserted in the holder and slid in the locking position, wherein the locking member comprises a resilient member that is positioned within the opening in operational use and being configured for being pressed in when the bracket is being slid from the unlocked position to the locking position and for taking in its original position when the bracket is fully in the locking position for providing a stable support under the bracket, wherein the resilient member is configured and placed such that is accessible through the opening for allowing being pressed in by a finger or tool thereby releasing the bracket and allowing it to be slid back to its unlocked position. - a bracket having a mounting portion and a head portion connected to the mounting portion via a narrowed neck portion, wherein the mounting portion, the head portion and the narrowed neck portion are flat and define a shape extending in a first plane, wherein the head portion points in an axial direction of the bracket within the first plane, wherein the mounting portion is configured for being mounted to the first panel; - a holder having an opening having a shape being defined in a further plane, the holder being configured for being mounted to the second panel, wherein the shape of the opening comprises a first part for receiving the head portion of the bracket in an unlocked position, wherein the holder and the bracket are configured such that, in operational use of the mounting system, the bracket may be inserted in the opening in such a way that the axial direction of the bracket is under an insertion angle with the further plane, wherein the shape of the opening comprises a second part adjacent to the first part and being narrower than the first part, the second part being configured for receiving the narrowed neck portion in a locking position when the bracket is slid from the first part to the second part in a direction substantially parallel to the further plane, and - a locking member for holding the bracket in the locking position after that it has been inserted in the holder and slid in the locking position, wherein the locking member comprises a resilient member that is positioned within the opening in operational use and being configured for being pressed in when the bracket is being slid from the unlocked position to the locking position and for taking in its original position when the bracket is fully in the locking position for providing a stable support under the bracket, wherein the resilient member is configured and placed such that is accessible through the opening for allowing being pressed in by a finger or tool thereby releasing the bracket and allowing it to be slid back to its unlocked position.