A shock absorber comprising a cylinder having a cylinder wall (12.1), and a piston sealing against the cylinder wall and dividing the cylinder in first and second cylinder chambers (10.1, 10.2), the piston being movable within the cylinder along the cylinder wall and along a longitudinal direction of the piston and the cylinder in inward and outward directions (Mi, Mo) upon inward and outward movement, respectively, of the piston inside the cylinder, a first side (11.1) of the piston being associated with the first cylinder chamber (10.1) and a second side (11.2) of the piston being associated with the second cylinder chamber(10.2), the piston comprising - a first main channel (101, 301) and a first main non-return valve associated with the first main channel such that the first main channel and the first main non-return valve allow and damp a first main fluid flow from the second side (11.2) to the first side (11.1) of the piston; - a second main channel (202, 302) and a second main non-return valve associated with the second main channel such that the second main channel and second main non-return valve allow and damp a second main fluid flow from the first side (11.1) to the second side (11.2) of the piston; - a ring-shaped connecting member comprising a part of the first main channel and a part of the second main channel; - a first central member comprising another part of the first main channel and received in the connecting member at a first side of the connecting member, which is transverse to the longitudinal direction of the piston and associated with the first side (11.1) of the piston such that the parts (301, 101) of the first main channel in the connecting member and the first central member are in line; - a second central member comprising another part of the second main channel and received in the connecting member at a second side of the connecting member, which is transverse to the longitudinal direction of the piston and associated with the second side (11.2) of the piston such that the parts (302, 202) of the second main channel in the connecting member and the second central member are in line; - a first central member channel provided on a side of the first central member, which is transverse to the longitudinal direction of the piston and associated with the second side (11.2) of the piston, the first central member channel being in fluid communication with the second side (11.2) of the piston; - a second central member channel provided on a side of the second central member, which is transverse to the longitudinal direction of the piston and associated with the first side (11.1) of the piston, the second central member channel being in fluid communication with the first side (11.1) of the piston; and - an auxiliary valve configured and arranged between the first and second central member channels (105, 205) to influence an auxiliary fluid flow between the first and second sides (11.1, 11.2) of the piston. - a first main channel (101, 301) and a first main non-return valve associated with the first main channel such that the first main channel and the first main non-return valve allow and damp a first main fluid flow from the second side (11.2) to the first side (11.1) of the piston; - a second main channel (202, 302) and a second main non-return valve associated with the second main channel such that the second main channel and second main non-return valve allow and damp a second main fluid flow from the first side (11.1) to the second side (11.2) of the piston; - a ring-shaped connecting member comprising a part of the first main channel and a part of the second main channel; - a first central member comprising another part of the first main channel and received in the connecting member at a first side of the connecting member, which is transverse to the longitudinal direction of the piston and associated with the first side (11.1) of the piston such that the parts (301, 101) of the first main channel in the connecting member and the first central member are in line; - a second central member comprising another part of the second main channel and received in the connecting member at a second side of the connecting member, which is transverse to the longitudinal direction of the piston and associated with the second side (11.2) of the piston such that the parts (302, 202) of the second main channel in the connecting member and the second central member are in line; - a first central member channel provided on a side of the first central member, which is transverse to the longitudinal direction of the piston and associated with the second side (11.2) of the piston, the first central member channel being in fluid communication with the second side (11.2) of the piston; - a second central member channel provided on a side of the second central member, which is transverse to the longitudinal direction of the piston and associated with the first side (11.1) of the piston, the second central member channel being in fluid communication with the first side (11.1) of the piston; and - an auxiliary valve configured and arranged between the first and second central member channels (105, 205) to influence an auxiliary fluid flow between the first and second sides (11.1, 11.2) of the piston.