Fuel Filter Insert with a Prefilter and a Main Filter Element, and Fuel Filter

A fuel filter comprising:

• a filter housing;
• a fuel filter insert arranged in the fuel filter housing, the fuel filter insert comprising a low-pressure region;
• a prefilter element arranged in the low-pressure region;
• a high-pressure region arranged fluidically downstream of the low-pressure region;
• a main filter element arranged in the high-pressure region, wherein the prefilter element and the main filter element are arranged one atop the other in an axial direction relative to a longitudinal axis of the fuel filter insert;
• and a wall element disposed at the main filter element and projecting away from the main filter element in the axial direction and extending at least partially through the prefilter element, wherein the low-pressure region and the high-pressure region at least over sections thereof are separated from each other by the wall element;
• wherein the filter housing comprises a fuel outlet and a fuel inlet for a fuel prefiltered by the prefilter element, wherein the fuel inlet and the fuel outlet are fluidically intermediately positioned between the low-pressure region and the high-pressure region and are configured to connect a fuel pump thereto.