So for $579 you are paying to have an oil change, air filter swapped out, and fuel filter replaced. That is about $50 in parts if you go for the good stuff. Other than that they are just LOOKING at everything to make sure its serviceable. Honesty, you are better off getting quotes from independent or chain service stations if you cannot do the work yourself.
Look in your maintenance schedule and see what is actually involved. Take that to an independent shop and see what they charge you for the same work.