i dont even think you need a female torx set, i didnt need one for mine. i jut used a deepwell socket (i think) to turn the tensioner counter clockwise. the belt replacement is simple. even simpler if you dont want the old belt and you just cut it off. make sure the tension is released before you cut it lol. also make sure you make a diagram or have some way of knowing how the new belt goes on. as for the hoses, do they need to be replaced? are they leaking? if so, you can do this yourself too... just have to drain the coolant, replace hoses (simple) and then refill with antifreeze. you can also get mb coolant from autohaus as well!!!! its way better than buying it from the dealer in my opinion.