These following websites provide valuable stored knowledge in discussion threads, someone's hardwork to put together repair/service procedures, and very helpful and knowledgable people (including professionals) to answer your questions. I certainly owe them a big thanks
Has lots of 2001+ V/XC70 service procedures. PDFed directly from the electronic service manual.
Lots of pre 2001 service procedures. Some are similar to 2001+ P2 cars.
Lots of common info for this car. Definitely skim through here and search this thread for keywords on your particular issues. Changes are that you will find it here.
You'd be surprised how much info google comes up with when you enter something like "Volvo XC70 xxxx"
Lots of P2 XCers hang out here
Lots of P2 none XCers hang out here. To search the full database of historical posts here, choose "Recent" and "Archived" content and try both "Topic Title" and "Post Bodies"
Lots of 98,99,00 cars enthusiasts hang out here including Volvo techs and weekend racing enthusiasts.
Lots of forum topics on both P1 and P2 cars. Moderators are always present to answer your questions!
A Volvo tech hangs out here and seems to answer all questions. Very knowledgeable! Answers are quite short since he seems to answer a lot of questions
Mostly Europeans hang out here.
Hints on search function in this site: The default search window is only the last single day of posts. Set this to "Search the whole archive" to get more hits.
Lots of pre P2 Volvo infos here.