8.5 qts of Mobil one and $20 filter = Not a cheap oil change, but the FSS system will indicate 7-9K intervals depending on your driving habits, so thats not too bad. Otherwise, it's basic M-B type of costs.
They are a bargain basement Benz, for those astute enough to see it...You aren't missing anything, except a grin every time you turn the key...now pull the trigger and HAVE FUN!!!