Can't tick simulate physics in vehicle BP

Hi guys. I just added a car i got free from online to a blueprint and the simulate physics box is grayed out.

I went into the skeletal mesh editor and the collision in the below image is what it has. Is this considered “complex” and thus didables physics?

If not, i don’t know why this box would be disabled. Im following a tutorial and he uses a diffetent car, and his simulate physics is fine.

Can you guys give me something i can try to fix it?

Thanks a lot!