Dunno i fanybody is interested, but i solved my issue so i'm posting it:
in the file featured.php you need to modify the query in the following way:
$random_featured_products_query = "select p.products_id, p.products_image, p.products_model,pd.products_name,
p.master_categories_id

then you need to add some code in the file tpl_featured.php as below:
$content .= '<br />' . $random_featured_product->fields['products_name'] .'<br />'.$random_featured_product->fields['products_model'].'</a>';