The Supplemental Restraint System (airbag) light just went on. My 240 has 180K on it. Fuses are all fine. My manual says air bag module & sensor unit should be replaced every 10 years by Volvo dealer. Yikes, I can see big bucks flying away! Anything I can get to by myself? Of course the manual says don't attempt service yourself . . . My Haynes manual only covers to '86 so has nothing to say about airbags. Thanks much, Jay