Abstract: A method for operating a drive-train (1) of a motor vehicle, wherein the drive-train (1) comprises an internal combustion engine, a transmission connected between the internal combustion engine and a drive output, and a compressed aft system of a brake unit. While the motor vehicle is traveling, if a manual command is issued or if defined operating conditions are satisfied, the drive-train (1) is operated in a coasting mode in which the drive-train (1) is disengaged and the internal combustion engine is turned off. In order to achieve the coasting mode, a pressure in the compressed air system of the brake unit is increased before the internal combustion engine is turned off.

Abstract: A method for operating a drive-train (1) of a motor vehicle having an internal combustion engine, a transmission connected between the internal combustion engine and a drive output, and a brake assembly. While the motor vehicle is traveling, if a manual command is given or if defined operating conditions exist, the drive-train (1) is operated in a coasting mode, in which the drive-train (1) is disengaged and the internal combustion engine is turned off. If the internal combustion engine, turned off for the coasting mode, fails to restart despite the existence of a signal to restart the internal combustion engine, a braking process is initiated automatically.

Abstract: A method for operating a drive-train (1) of a motor vehicle. The drive-train (1) has an internal combustion engine, a transmission connected between the internal combustion engine and a drive output, and a compressed air system of a brake unit. While the motor vehicle is travelling, if a manual command is issued or if defined operating conditions are satisfied, the drive-train (1) is operated in a coasting mode in which the drive-train (1) is disengaged and the internal combustion engine is turned off. During the coasting mode, a pressure in a compressed air system of the brake unit is determined, and if the determined pressure reaches or falls below a predefined first pressure value, the pressure in the compressed air system of the brake unit is automatically increased, via a pressure-generator, to a predefined second pressure value.