Brake system for a vehicle comprising: a brake pedal valve and at least one brake valve unit for actuating a brake actuator having: a brake valve for applying pressurized fluid to the brake actuator in response to a control pressure applied to a hydraulic actuator of the brake valve , a blocking valve for controlling application of pressurized fluid from the brake pedal valve to the hydraulic actuator of the brake valve , and a brake pressure control valve for controlling application of pressurized fluid to the hydraulic actuator of the brake valve , characterized in that the brake system comprises a control unit configured to operate the brake system in an automatic retarding control mode and in a brake assist mode; and wherein the blocking valve is biased towards an open position; and wherein the at least one brake valve unit further comprises a shuttle valve including an output port fluid-communicatively connected to the hydraulic actuator , a first input port fluid-communicatively connected to the blocking valve , and a second input port fluid-communicatively connected to the brake pressure control valve , wherein in the automatic retarding control mode, the control unit is configured to actuate the brake pressure control valve so as to apply pressurized fluid to the second input port , while the blocking valve is biased in its open position such that the brake pedal valve is fluid-communicatively connected to the first input port . a brake pedal valve and at least one brake valve unit for actuating a brake actuator having: a brake valve for applying pressurized fluid to the brake actuator in response to a control pressure applied to a hydraulic actuator of the brake valve , a blocking valve for controlling application of pressurized fluid from the brake pedal valve to the hydraulic actuator of the brake valve , and a brake pressure control valve for controlling application of pressurized fluid to the hydraulic actuator of the brake valve , characterized in that a brake valve for applying pressurized fluid to the brake actuator in response to a control pressure applied to a hydraulic actuator of the brake valve , a blocking valve for controlling application of pressurized fluid from the brake pedal valve to the hydraulic actuator of the brake valve , and a brake pressure control valve for controlling application of pressurized fluid to the hydraulic actuator of the brake valve , characterized in that the brake system comprises a control unit configured to operate the brake system in an automatic retarding control mode and in a brake assist mode; and wherein the blocking valve is biased towards an open position; and wherein the at least one brake valve unit further comprises a shuttle valve including an output port fluid-communicatively connected to the hydraulic actuator , a first input port fluid-communicatively connected to the blocking valve , and a second input port fluid-communicatively connected to the brake pressure control valve , wherein in the automatic retarding control mode, the control unit is configured to actuate the brake pressure control valve so as to apply pressurized fluid to the second input port , while the blocking valve is biased in its open position such that the brake pedal valve is fluid-communicatively connected to the first input port . <EOS>