Installation system comprising a mounting element with at least one profile element (3, 4, 5), a sanitary article to be attached to the mounting element, and at least one connecting element for connecting the sanitary article to the at least one profile element (3, 4, 5), wherein the connecting element has a connecting part on the sanitary article side and a connecting part on the profile element side, wherein the connecting part on the sanitary article side can be brought into contact with the connecting part on the profile element side along an insertion movement and enters into a fixed engagement, wherein the two connecting parts (8, 9) come into contact with one another via contact surfaces located on the connecting parts (8, 9), and wherein furthermore a sound-absorbing material is present, which is arranged in such a way that the two connecting parts (8, 9) are sound-decoupled in fixed engagement with one another, wherein the sound-absorbing material is arranged in such a way that the two connecting parts (8, 9) are sound-decoupled in fixed engagement with one another, wherein the sound-absorbing material is a sound-absorbing layer arranged between the contact surfaces, characterized in that the connecting part on the sanitary article side engages with the connecting part on the profile element side via at least one latching connection, in that the latching connection has a latching tab on one of the connecting parts (8, 9) and a latching recess on the other of the connecting parts (9, 8), wherein the latching tab engages in the latching recess and wherein the two connecting parts (8, 9) are mechanically firmly latched together via the engagement, and in that the latching tab is articulated to the connecting part (8, 9) via a spring section and forms a free end of the spring section. a mounting element with at least one profile element (3, 4, 5), a sanitary article to be attached to the mounting element, and at least one connecting element for connecting the sanitary article to the at least one profile element (3, 4, 5), wherein the connecting element has a connecting part on the sanitary article side and a connecting part on the profile element side, wherein the connecting part on the sanitary article side can be brought into contact with the connecting part on the profile element side along an insertion movement and enters into a fixed engagement, wherein the two connecting parts (8, 9) come into contact with one another via contact surfaces located on the connecting parts (8, 9), and wherein furthermore a sound-absorbing material is present, which is arranged in such a way that the two connecting parts (8, 9) are sound-decoupled in fixed engagement with one another, wherein the sound-absorbing material is arranged in such a way that the two connecting parts (8, 9) are sound-decoupled in fixed engagement with one another, wherein the sound-absorbing material is a sound-absorbing layer arranged between the contact surfaces, characterized in that the connecting part on the sanitary article side engages with the connecting part on the profile element side via at least one latching connection, in that the latching connection has a latching tab on one of the connecting parts (8, 9) and a latching recess on the other of the connecting parts (9, 8), wherein the latching tab engages in the latching recess and wherein the two connecting parts (8, 9) are mechanically firmly latched together via the engagement, and in that the latching tab is articulated to the connecting part (8, 9) via a spring section and forms a free end of the spring section.