FLAT-FILTER FILTER ELEMENT WITH AT LEAST TWO FILTER MEDIUM BODIES, FILTER SYSTEM AND USE OF A FLAT-FILTER FILTER ELEMENT

The invention relates to a flat-filter filter element (10) for filtering a fluid, in particular for filtering air, for a filter system (100), in particular for an air filter system of a fuel cell system, having an arrangement of at least two flat-filter medium bodies (12, 32) being arranged adjacent to each other in an axial direction (80) so that the fluid can flow through them one after the other in the axial direction (80). The filter medium bodies (32, 12) each comprise a lateral band (27, 48) at their outer circumference (26, 46). The lateral band (27, 48) of one of the filter medium bodies (12, 32) protrudes in axial direction (80) over the other one of the filter medium bodies (12, 32) and at least partly overlaps the lateral band (48, 27) of the other of the filter medium bodies (32, 12) in an overlapping region (72), the lateral bands (27, 48) in the overlapping region (72) being at least partially embedded in a circumferential cast element (40) arranged at a downstream side (21) of the arrangement of filter medium bodies (12, 32).