Why does the engine hood of the Tiguan pop up by itself?

[LaSebastian]

Car fuel tank cap pops out due to fuel tank cap malfunction. Extended information about car fuel tank caps is as follows: 1. Fuel tank cap location: The fuel tank cap refers to the cap on the car's fuel tank used for storing gasoline. The fuel tank cap may be located on the left or right side of the vehicle body. Sometimes when refueling, one may forget which side the fuel tank cap is on. Actually, there is an arrow indicator on the car's dashboard fuel gauge - the direction the arrow points indicates which side the fuel filler is located. 2. Fuel tank cap opening methods: There are two types - press-type and switch button-type. The press-type opening method is very simple. When the car is unlocked, simply press the fuel tank cap with your hand to open it. This opening method is more common in American and German cars. The switch button-type is controlled by a switch button inside the car. The location of this switch varies in different car models. When refueling, the fuel tank cap needs to be opened using the interior switch.