Removing the adjustments knobs from the seat
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.
Removing the adjustment knob from the lumber support:
Turn the knob counter-clockwise as far as possible.
Carefully pry out the center section using a screwdriver. Then pull out the center section and pull out the adjustment knob.
Remove the washer.
Removing the adjustment knob for the backrest:
Pull off the knob with a twisting movement.
Remove the nut from the shaft.
Remove the guide for the adjustment knob.