Remove the retaining springs and locating pins for the brake pads.

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Retaining Springs And Brake Pad Pins

Courtesy of VOLVO CARS OF NORTH AMERICA.

Remove:

the retaining spring (3) carefully so that it does not deform
the protective caps (1) from the two locating pins (2)
the locating pins, use hex socket 7 mm.