Thanks one and all for the suggestions / information regarding obtaining a shop manual and door lock issues. As it turns out, I do remember pressing the door lock button whilst I was exiting the vehicle (prior to removing the key from the ignition) which probably explains why the doors seemed to unlock themselves.
As for obtaining the shop manual, I believe that I will have to wait and see if I can find a suitable substitute for the $1600-$1700 one available from Volvo. Perhaps the $25 per year on line one might be just what I need. I understand that some mechanics do copy the CD's that the original comes on, but I'm not sure if this would leave me hanging out on a not too sturdy legal limb. However once I do purchase one, I'll post my source and price.
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