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

Your selected combination correctly identifies two potential causes for a non-working brake light. In Germany, it's crucial for all vehicle lights, especially brake lights, to function properly for safety reasons. A defective fuse can disrupt the entire electrical circuit for the brake lights, preventing them from illuminating. Similarly, a faulty bulb means the brake light won't show even if the electrical circuit is intact.

However, it’s also important to consider other potential issues, such as the fill level of brake fluid, which can affect braking performance and, indirectly, the activation of brake lights. While a low fluid level doesn't directly cause the brake light to malfunction, it can signal other braking system problems that need addressing.

Ensuring that all related components are functioning is integral to vehicle safety and is mandated under German traffic regulations, which emphasize the importance of maintaining all lighting and signaling devices in good working order.