To meet increasing requirements in regard of safety, comfort and networking the electric parking brake is progressively replacing the mechanical hand brakes. In addition to the improved safety and comfort for the customers it offers the car manufacturers more freedom and options for the vehicle interior design. The Electric Parking Brake in general replaces the mechanical activation via the hand brake lever by an electrical switch and electromechanical actuators building up the required clamp forces. The EPB-Si is another industry's mainstream product within the portfolio of EPB solutions being developed by Continental. It is a park brake system for A/B class vehicles with low system costs. Electromechanical actuators are directly mounted to the rear axle drum brakes for achieving the brake torque and will be controlled by available devices known from caliper integrated systems.