WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Relevant Secondary Lock Released By Adjusting Locks With An Electrician's Screwdriver
Courtesy of VOLVO CARS OF NORTH AMERICA.
Release the relevant secondary lock by adjusting the locks with an electrician's screwdriver, as shown in the illustration.