Brakes are systems for reducing the speed of motor vehicles. In most cases, they convert kinetic energy to heat through friction surfaces. A typical example of a brake assembly is the brake caliper, which is also referred to as brake caliper. Brake calipers are available as a swimming saddle, which is increasingly used in vehicles, and fixed saddles and are used in disc brakes. As soon as the driver steps on the brake pedal, a hydraulic pressure is generated which presses the brake linings onto the brake disc in order to reduce the speed of the vehicle. After the end of the braking, the brake piston is driven into its initial situation and the brake disc turns again without external delay. With brake calipers, the function of a parking brake, Which secures vehicles which are parked against unwanted rolling, can be realized. Electromechanical parking brakes are also available depending on the model. For safety reasons, passenger cars now use two-stage braking systems.