The brake light of your vehicle is not working. What could be the cause of this?

Your answer included the correct options regarding the potential causes for a non-functioning brake light: the defective fuse and the defective bulb. These are common issues that can lead to brake lights failing, which is crucial for vehicle safety and compliance with German traffic regulations.

However, you also included an additional option regarding the brake fluid level. While low brake fluid can affect braking performance overall, it is not directly related to the functioning of the brake light itself. Thus, the combination of the fuse and bulb being defective is essential, as these directly impact whether the brake light illuminates when the brakes are applied.

Selecting the correct combinations is important under German traffic laws because functioning brake lights are vital for signaling intentions to other drivers, thereby maintaining road safety. Regular checks of your vehicle’s lighting system, including the brake lights, should be part of routine vehicle maintenance.