Method for controlling pressure in a vehicle with a pneumatic brake system (1, 12, 31, 34, 61), wherein the vehicle comprises at least the following: a) a drive motor to generate a drive power of the vehicle, b) the pneumatic brake system (1, 12, 31, 34, 61) for braking the vehicle and comprising at least the following: b1) several compressed-air brake cylinders, b2) a compressed-air supply and storage assembly (12, 34) with at least one first compressed-air storage container in the form of a brake circuit compressed-air container, from which one or more compressed-air brake cylinders are pressurized with compressed air on braking of the vehicle, b3) an air compressor (1, 61) which is or can be coupled with the drive motor of the vehicle, with the features: c) in a first compressed-air generating mode (43, 52, 55), compressed air generated in compression phases of the air compressor (1, 61) is conducted from a compression chamber of the air compressor (1, 61) into the brake circuit compressed-air container, d) in a first compressed-air expansion mode, in expansion phases of the air compressor (1, 61), compressed air is conducted from the brake circuit compressed-air container to the compression chamber of the air compressor (1, 61), e) at least one or both of the following further compressed-air expansion modes (47, 49, 60) are provided: e1) in a second compressed-air expansion mode, in expansion phases of the air compressor (1, 61), compressed air is conducted from a second compressed-air storage container into the compression chamber of the air compressor (1, 61), e2) in a third compressed-air expansion mode, in expansion phases of the air compressor, compressed air is conducted from a third compressed-air storage container into the compression chamber of the air compressor (1, 61). a) a drive motor to generate a drive power of the vehicle, b) the pneumatic brake system (1, 12, 31, 34, 61) for braking the vehicle and comprising at least the following: b1) several compressed-air brake cylinders, b2) a compressed-air supply and storage assembly (12, 34) with at least one first compressed-air storage container in the form of a brake circuit compressed-air container, from which one or more compressed-air brake cylinders are pressurized with compressed air on braking of the vehicle, b3) an air compressor (1, 61) which is or can be coupled with the drive motor of the vehicle, with the features: b1) several compressed-air brake cylinders, b2) a compressed-air supply and storage assembly (12, 34) with at least one first compressed-air storage container in the form of a brake circuit compressed-air container, from which one or more compressed-air brake cylinders are pressurized with compressed air on braking of the vehicle, b3) an air compressor (1, 61) which is or can be coupled with the drive motor of the vehicle, c) in a first compressed-air generating mode (43, 52, 55), compressed air generated in compression phases of the air compressor (1, 61) is conducted from a compression chamber of the air compressor (1, 61) into the brake circuit compressed-air container, d) in a first compressed-air expansion mode, in expansion phases of the air compressor (1, 61), compressed air is conducted from the brake circuit compressed-air container to the compression chamber of the air compressor (1, 61), e) at least one or both of the following further compressed-air expansion modes (47, 49, 60) are provided: e1) in a second compressed-air expansion mode, in expansion phases of the air compressor (1, 61), compressed air is conducted from a second compressed-air storage container into the compression chamber of the air compressor (1, 61), e2) in a third compressed-air expansion mode, in expansion phases of the air compressor, compressed air is conducted from a third compressed-air storage container into the compression chamber of the air compressor (1, 61). e1) in a second compressed-air expansion mode, in expansion phases of the air compressor (1, 61), compressed air is conducted from a second compressed-air storage container into the compression chamber of the air compressor (1, 61), e2) in a third compressed-air expansion mode, in expansion phases of the air compressor, compressed air is conducted from a third compressed-air storage container into the compression chamber of the air compressor (1, 61).