Braking system, and valve with activatable holding force

A brake system including:

• at least two wheel brake cylinders, which are each part of separate wheel circuits,
• respective hydraulic connection lines connected to respective ones of the at least two wheel brake cylinders and also forming parts of respective ones of the separate wheel circuits,
• at least one pressure supply, which serves at least to build up pressure in the at least two wheel brake cylinders,
• at least one reservoir,
• at least one electronic control and regulating unit,
• switching valves, wherein each of the at least two wheel brake cylinders is connected via its respective hydraulic connecting line to a respective one of the switching valves, which serves to disconnect and connect the respective hydraulic connection of the respective wheel brake cylinder and at least one further hydraulic main line, via which the respective switching valve is enabled to be connected at least to the at least one pressure supply,
• wherein diagnoses of respective leakages of the individual wheel circuits are carried out, and wherein, depending on the diagnostic results, an electronic control and regulating unit of the at least one electronic control and regulating unit decides whether a given wheel circuit is switched off by permanently closing the associated switching valve of the given wheel circuit or continues to be operated to generate a braking effect.