Side/window Air Bag problems of the 1996 Audi A4

While travleing at 20-25 mph vehicle was involed in a head-on collision, crashed into a wall. Upon impact, driver's side and passenger's side air bags did not deploy. Has contacted dealer, and they will inspect vehicle.

Driver's side airbag deployed without impact; parked in garage, shifted to park; parking brakes applied; vehicle still running; airbag deployed as driver was exiting vehicle; no warning.