Worst behavior. It functions like a spring, meaning it doesn't resist the pulling force when opening the trunk door, and if you don't hold it with your hand, it works like a trapdoor. You can't bring it back to close with one hand. Luckily, I have kept the old ones; I'm thinking of putting one of them back to see if it behaves better, and I will come back. It goes without saying that it is not recommended at all. I regret paying another 15 euros to put the Marshals on and I made a mistake.