Abstract: A hydropneumatic suspension system having at least one shock and vibration damper including a cylinder-piston unit (2) provided with a gas storer (34) co-acting with a damping valve (60) provided with choke valves (88, 90, 92, 94). The choke valves (88, 90, 92, 94) include valve elements (96) biased with springs (98) in a closing direction of the valve elements (96). The bias tension of the springs (98) is variable by a setting member (100) acting on these springs (98) in common in a closing or opening direction of the valve elements (96). A load-dependent adjustment of the damping can be achieved, as the setting member (100) is driven by the pressure present inside the gas storer (34).