A 2007 S80 alm,ost certainly has an event data recorder. It is mentioned in the Owner’s manual. Section 6.
http://new.volvocars.com/ownersdocs/2007/2007_s80/07s80_00.htm
It’s sometimes difficult to tell whether a car has one or not. NHTSA began to talk about mandating them in around 2003, and mfgs began installing them around then. By about 2005, they were becoming common. By about 2010, they were almost universal.
The mandated date was originally in 2010, then changed to 2012, for EDRs.
My 2008 Jeep specifically says it has one in the owner’s manual.
So, if you lose the owner's manual, you're safe?
Passing this along to Mr. Megan - thank you!