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: Removing Ashtray Assembly
Courtesy of VOLVO CARS OF NORTH AMERICA.
Remove:
the ashtray
the two screws. Pull out the bracket
the connectors for the cigarette lighter and lighting.