Removing the mechanism
WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect the micro-switch according to Replacing the backrest micro-switch (power seat only).
Replace cables.
Remove upholstery as illustrated above.
Remove the two screws.
Remove the mechanism.
Install:
In reverse order.