The brake line to a wheel brake cylinder of your motor vehicle is leaking heavily. How can you detect this issue?

Your answer is correct because all three options describe ways to detect a heavy leak in the brake line of your vehicle. According to German traffic rules and vehicle safety regulations, a leaking brake line reduces the hydraulic pressure in the brake system, which leads to:

1. Noise from escaping air or fluid when the brake is applied, signaling a leak.
2. Activation of the pressure warning indicator (brake warning light) on the dashboard, alerting the driver to a problem in the brake system.
3. A noticeably reduced braking effect while driving, making it harder to stop the vehicle safely.

Recognizing these signs promptly is crucial for safety, as brake failure can lead to accidents. If you notice any of these symptoms, you should stop driving immediately and have the brake system repaired.