Can't get appended objects to edit

I’m having issues trying to edit an appended object from another blender file. How do I get it to work in Edit mode? Is that possible in Blender 2.8?

EDIT: File link
https://www.mediafire.com/file/69jhd9xcoqdrw5p/Minicar.blend/file

Press Alt+H in edit mode?

Never mind, fixed it.