Air filter

An air filter comprising:

• a filter housing comprising an inlet opening at a raw air side, a first outlet opening at a clean air side, and a closable service opening;
• a first filter element and a second filter element, the first filter element and the second filter element arranged inside the filter housing between the inlet opening and the first outlet opening;
• a mounting frame, wherein the first filter element is arranged in the mounting frame;
• wherein the first filter element and the second filter element are configured to be flowed through serially in one or more operating states of the air filter;
• wherein the mounting frame is insertable through the service opening into the filter housing in a joining direction and is removable from the filter housing opposite to the joining direction;
• wherein a clamping wedge is arranged at the mounting frame;
• wherein the second filter element comprises a wedge stop;
• wherein the clamping wedge arranged at the mounting frame, upon insertion of the mounting frame into the filter housing, contacts the wedge stop of the second filter element and clamps the second filter element at the filter housing in a clamping direction transversely to the joining direction.