Display Custom Post Type on Toolset Types Plugin

I have created a custom post type with php and my problem is that this post type is not appearing in the menu of Toolset Types Plugin. I think that must be some option that I have to fill but I have tried with almost everything and I don´t know why this is happening.

I want to edit the relationship between post types, specially between cars and news.

My code to create the custom post type is this.

function car_post_type() {
    $labels = array(
        'name' = 'Coches',
        'singular_name' = 'Coche',
        'menu_name' = 'Coches',
        'name_admin_bar' = 'Coches',
        'parent_item_colon' = 'Padre:',
        'all_items' = 'Todos los coches',
        'add_new_item' = 'Añadir nuevo coche',
        'add_new' = 'Añadir coche',
        'new_item' = 'Nuevo coche',
        'edit_item' = 'Editar coche',
        'update_item' = 'Actualizar coche',
        'view_item' = 'Ver coche',
        'search_items' = 'Buscar coches',
        'not_found' = 'No hay resultados',
        'not_found_in_trash' = 'No se han encontrado coches en la papelera',
    );
    $rewrite = array(
        'slug' = 'coche',
        'with_front' = true,
        'pages' = true,
        'feeds' = true,
    );
    $args = array(
        'label' = __( 'Car', 'clever' ),
        'description' = __( 'Cars', 'clever' ),
        'labels' = $labels,
        'supports' = array(
            'title', 'editor', 'excerpt', 'thumbnail', 'revisions',
        ),
        'taxonomies' = array(),
        'hierarchical' = false,
        'public' = true,
        'show_ui' = true,
        'show_in_menu' = true,
        'menu_position' = 5,
        'menu_icon' = 'dashicons-dashboard',
        'show_in_admin_bar' = true,
        'show_in_nav_menus' = true,
        'can_export' = true,
        'has_archive' = true,
        'exclude_from_search' = false,
        'publicly_queryable' = true,
        'rewrite' = $rewrite,
        'capability_type' = 'post',
    );

    register_post_type('car', $args);
}
add_action('init', 'car_post_type', 0);

Thanks for your help.