The URL address should work fine. But if there is any trouble, try going to http://www.volvocars.com and then find your way into the US site by clicking on 'United States' under 'Americas'. This will transfer you to http://www.volvocars.us automatically.
And then creep your way (
) into 'Owners Info' at the top bar. Then click 'Search Library' from the left navigation menu.
All the best!
Great if you can cenvert them. Will be waiting for the .pdf files.