You can go to sites to find out what you should do at each service interval. The Volvo America site has information, as does cars.com (the "Car Talk" section, I believe), and edmunds.com and probably a couple of other sites. Edmunds actually estimates the cost of each service, with a breakdown of what procedure will cost how much.

Good luck. And pay attention to any abnormality (for example, a need to replace something long before the scheduled maintenance).

Joe