2008 Volvo S40 Owner's Manual - Page 24
2008 Volvo S40 Manual
Page 24 highlights
If your car has been involved in a rearend collision, the front seat backrests must be inspected by a trained and qualified Volvo service technician, even if the seats appear to be undamaged. Certain components in the WHIPS system may need to be replaced. Do not attempt to service any component in the WHIPS system yourself. WARNING Any contact between the front seat backrests and the folded rear seat could impede the function of the WHIPS system. If the rear seat is folded down, the occupied front seats must be adjusted forward so that they do not touch the folded rear seat. WARNING Boxes, suitcases, etc. wedged behind the front seats could impede the function of the WHIPS system. If the rear seat backrests are folded down, cargo must be secured to prevent it from sliding forward against the front seat backrests in the event of a collision from the rear. This could interfere with the action of the WHIPS system. 29 01 Safety Crash mode Driving after a collision