my s70 glt is about to reach 100 000 miles, what service needs to be done?

 

Did you do the major service at 90K?
105k is a minor service but also requires the Timing Belt to be replaced, Skip that service and you risk destroying the engine. Here is the maintance schedule that is on page 118 of your owners manual. http://new.volvocars.com/ownersdocs/..._115.htm#pg118