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

The selected combination of answers is correct because all three aspects are critical indicators of a brake line leak in a vehicle.

1. Noise from escaping compressed air: This can indicate that air is escaping from the brake system, which often means there is an issue with the brake lines or components.
2. Pressure warning indicator: Modern vehicles are equipped with sensors that alert the driver to any drop in braking pressure. A leak in the brake line will trigger this warning light, making it crucial for safety.
3. Reduced braking action: If the brake system is compromised due to a leak, the driver will notice ineffective braking performance. This reduction in braking capacity can significantly increase the risk of accidents.

According to German traffic regulations, maintaining a well-functioning braking system is mandatory for vehicle safety. Ignoring signs like these can lead to serious accidents, underlining the importance of regular inspections and immediate attention to any warning signs.