In what situation is the eCall system designed to be triggered manually?

You answered correctly. The eCall system in your vehicle is designed to be triggered manually if you witness a serious accident or if a passenger has a medical emergency. In these situations, activating eCall connects you directly with emergency services, providing your location and allowing for a quicker response. However, the system is not intended for situations like having a puncture, since this is not an emergency that requires immediate assistance. This is why only the first two answers are correct. Always use eCall for genuine emergencies to ensure emergency services remain available for those in urgent need.