What is the reason why the sunroof of the Volkswagen Lavida sometimes opens automatically?

[EvangelineRose]

The automatic opening of the sunroof is caused by foreign objects that were once stuck in the sunroof track, causing the sunroof to memorize this position to prevent forced closure from damaging the sunroof system. The issue can be resolved by resetting the sunroof position. Below are the detailed explanations: 1. Solution: When the sunroof opens automatically, you can see a controller in the middle front part of the interior sunroof. It is a knob-style controller, and rotating it (up, down, or horizontally) can control the opening and closing of the sunroof. 2. Function: The sunroof is installed on the car's roof. The sunroof glass can be tilted or opened manually or via motor drive, serving functions such as ventilation, air exchange, lighting, and heat dissipation. 3. Principle: The sunroof's ventilation utilizes the negative pressure principle. When the car is in motion, the rapid airflow over the sunroof creates negative pressure inside the vehicle, expelling the interior air. When the sunroof is opened, it first draws out the interior air rather than directly letting in outside air. After the polluted air is expelled, filtered fresh air is drawn in from the intake.