Abstract: A hydraulic unit with open-loop and closed-loop control of brake pressure in a brake circuit of an electronically slip-controllable braking system of a motor vehicle includes a pump housing, a motor for driving a brake pressure generator, and an electronic control device for controlling the motor in line with demand. The motor and the control device are disposed on opposite sides of the pump housing, and a shaft bore extending all the way through is formed therebetween, in which shaft bore a motor shaft which can be rotationally driven is disposed. A sealing apparatus seals the shaft bore with respect to an interior of the electronic control device. A sealing apparatus which comprises an insertion seal is disposed on the pump housing in a seal socket and a mechanical preloading force is applied by a preloading apparatus. A method of assembling the hydraulic unit is also provided.

Abstract: A method for avoiding error messages due to maintenance work on a vehicle, which are generated by a monitoring unit if one or multiple operating parameters of a monitored vehicle system are outside of a predefined, admissible value range. Accordingly, the general driving operation is monitored with the aid of a vehicle's own sensor system with respect to a maintenance state and, if a maintenance state is established, the admissible value range be automatically extended or at least one operating parameter is ignored during monitoring.

Abstract: In a method for detecting air in the brake circuit of a motor vehicle having a hydraulic brake system that has a vacuum brake booster, the pressure prevailing in the vacuum chamber of the vacuum brake booster in the operated and the non-operated states of the brake is measured, and a parameter characteristic of the brake performance is determined as a function of the measured pressure, and the characteristic parameter is compared to a reference value.

Abstract: A method for avoiding error messages due to maintenance work on a vehicle, which are generated by a monitoring unit if one or multiple operating parameters of a monitored vehicle system are outside of a predefined, admissible value range. According The general driving operation is monitored with the aid of a vehicle's own sensor system with respect to a maintenance state and, if a maintenance state is established, the admissible value range be automatically extended or at least one operating parameter is ignored during monitoring.

Abstract: In a method for detecting air in the brake circuit of a motor vehicle having a hydraulic brake system that has a vacuum brake booster, the pressure prevailing in the vacuum chamber of the vacuum brake booster in the operated and the non-operated states of the brake is measured, and a parameter characteristic of the brake performance is determined as a function of the measured pressure, and the characteristic parameter is compared to a reference value.