What happens if the service brake is activated while the permanent brake is switched on?

Activating the service brake while the permanent brake is engaged results in the application of a stronger braking force on the drive axle(s) wheels. This combination enhances the overall braking system's effectiveness, which is particularly important in maintaining vehicle control, especially under heavy loads or specific driving conditions, such as steep inclines.

According to German traffic regulations, it is essential that braking systems function properly and synergistically to ensure the safety of the vehicle and its occupants. Understanding how these brakes interact helps drivers make informed decisions in various driving scenarios, ensuring adherence to safety standards and regulations.