Which is more severe among flood-damaged vehicles from Level 1 to Level 4?

[LaFernando]

Flood-damaged vehicles refer to water-soaked cars that are sold to second-hand car markets across China through certain channels. Among the four levels of flood-damaged vehicles, Level 4 is the most severe. The classification of flood-damaged vehicles is as follows: Level 1 flood-damaged vehicle: The chassis of the vehicle is submerged in water. Level 2 flood-damaged vehicle: The water level reaches halfway up the vehicle's wheels, and water gradually begins to enter the interior. Level 3 flood-damaged vehicle: At this stage, the accumulated water submerges the tires, and the seat cushions and center console inside the vehicle are also submerged. Level 4 flood-damaged vehicle: Water enters the engine's intake pipe, and the dashboard inside the vehicle is about to be submerged.