haha, i knew your name looked familiar...... i sent you an email about the seat tracks from craigslist
thats my post too, i remember typing that....
you will need the tcase and output shaft of the 4x4 tranny.....
however, im not sure if there is a class difference with the w55 like there is with the w56 as the w56 has the a, b, c, etc models
i have a w55 for sale