What should be noted to avoid suffocation when sleeping in a car?

[Mildred]

To avoid suffocation when sleeping in a car, it is important to ensure proper ventilation by opening windows, activating the car's air circulation mode (both internal and external), and regularly checking for exhaust pipe leaks or tightly sealed windows. Below are precautions for sleeping in a car: 1. Open windows for ventilation: Maintain air circulation. Leaving a small gap can facilitate airflow. 2. Activate the car's air circulation mode (internal and external): Maintain interior temperature and air quality. To ensure proper air circulation, switch to the external circulation mode. 3. Regularly inspect the exhaust pipe: Prevent carbon monoxide poisoning. If exhaust fumes, particularly carbon monoxide, leak into the car, they can accumulate and increase in concentration, leading to poisoning. A damaged exhaust pipe makes it easier for exhaust gases to enter the car, raising the risk of hazards.