I had some problems like this and it all stemmed from wire harness damage at the LH tailgate hinge - a Volvo trademark. Unfortunately, in order to examine the wiring, you first have to get the tailgate open. You might try looking for a blown fuse in the rear fuse panel and hope you find one that allows the tailgate to unlock. If not, there is some discussion here about how to manually unlock the tailgate from inside the car - I've never tried this:
http://www.volvoxc.com/forums/showthread.php?8666-Rear-hatch-locked-shut
Here is a description of what I went through to repair the wiring:
http://www.matthewsvolvosite.com/forums/viewtopic.php?f=9&t=47882
Does you gas cap door still open?
Are you sure there isn't a place by the license plate lights to insert a key? (Sometimes has a rubber cover on it)
|