Method for operating a pressure control system in a vehicle, said method comprising at least the following steps: - controlling a flow-control valve (25a; 25b) in a charging line, which conveys a charging pressure medium, in dependence upon an admission pressure (pV) and/or upon an admission volume flow, wherein the admission pressure (pV) and/or the admission volume flow characterizes a prevailing or currently to be expected loading of a pneumatic consumer, in the form of a single-stage or multi-stage compressor, of the pressure control system during the supply of the charging pressure medium with a charging volume flow and at a charging pressure (pA) into the pneumatic consumer; - adjusting a flow-control cross-section, which acts on the charging pressure medium as it flows through the flow-control valve (25a; 25b), or adjusting an average flow-control cross-section (DQ_avg) so as to limit the charging volume flow to a limit volume flow, wherein the flow-control cross-section or the average flow-control cross-section (DQ_avg) is adjusted in a continuously variable manner in dependence upon the admission pressure (pV) and/or upon the admission volume flow (St2, St2.1, St2.2, St2.3); and - outputting the volume-flow limited charging pressure medium to the pneumatic consumer, characterized in that the flow-control valve is controlled pneumatically, wherein for this purpose a pneumatically controllable flow-control valve is controlled via a pneumatic control input at the admission pressure (pV) and/or with the admission volume flow, and the pneumatic flow-control valve changes its flow-control cross-section in a continuously variable manner in dependence upon the pneumatically supplied admission pressure (pV) and/or the admission volume flow so as to limit in a continuously variable manner the charging volume flow to the limit volume flow, and wherein - the admission pressure (pV) is predetermined by means of the charging pressure (pA) of the charging pressure medium and/or by means of a compression pressure of a compressed pressure medium that is flowing out of the pneumatic consumer or by means of a difference pressure (pDiff) between the charging pressure (pA) and the compression pressure, and - the admission volume flow is predetermined by the charging volume flow of the charging pressure medium and/or by means of a compression volume flow of the compressed pressure medium that is flowing out of the pneumatic consumer. - controlling a flow-control valve (25a; 25b) in a charging line, which conveys a charging pressure medium, in dependence upon an admission pressure (pV) and/or upon an admission volume flow, wherein the admission pressure (pV) and/or the admission volume flow characterizes a prevailing or currently to be expected loading of a pneumatic consumer, in the form of a single-stage or multi-stage compressor, of the pressure control system during the supply of the charging pressure medium with a charging volume flow and at a charging pressure (pA) into the pneumatic consumer; - adjusting a flow-control cross-section, which acts on the charging pressure medium as it flows through the flow-control valve (25a; 25b), or adjusting an average flow-control cross-section (DQ_avg) so as to limit the charging volume flow to a limit volume flow, wherein the flow-control cross-section or the average flow-control cross-section (DQ_avg) is adjusted in a continuously variable manner in dependence upon the admission pressure (pV) and/or upon the admission volume flow (St2, St2.1, St2.2, St2.3); and - outputting the volume-flow limited charging pressure medium to the pneumatic consumer, characterized in that the flow-control valve is controlled pneumatically, wherein for this purpose a pneumatically controllable flow-control valve is controlled via a pneumatic control input at the admission pressure (pV) and/or with the admission volume flow, and the pneumatic flow-control valve changes its flow-control cross-section in a continuously variable manner in dependence upon the pneumatically supplied admission pressure (pV) and/or the admission volume flow so as to limit in a continuously variable manner the charging volume flow to the limit volume flow, and wherein - the admission pressure (pV) is predetermined by means of the charging pressure (pA) of the charging pressure medium and/or by means of a compression pressure of a compressed pressure medium that is flowing out of the pneumatic consumer or by means of a difference pressure (pDiff) between the charging pressure (pA) and the compression pressure, and - the admission volume flow is predetermined by the charging volume flow of the charging pressure medium and/or by means of a compression volume flow of the compressed pressure medium that is flowing out of the pneumatic consumer.