As some people don't want ordering on the frontend, you can do the next to delete this dropdown box:

Go to the next file: ../components/com_rdautos/views/tmpl/category/tmpl/default.php

An remove the next lines:

<div id = "rda-ordering">
  
    <form method="GET" name="ordering" action="index.php">
    <input name="option" type="hidden" value="com_rdautos" />
    <input name="view" type="hidden" value="category" />
    <?php echo $this->lists[ordering]; ?>
    <input name="id" type="hidden" value="<?php echo $id; ?>" />
    <input name="limitstart" type="hidden" value="<?php echo $limitstart; ?>" />
    <input type="submit" class="button" value="GO!" />
  
    </div>