general problems of the 2005 Audi A8

Adaptive module j428 failed and brakes seized while vehicle was in motion. . Audi customer service said that since they could not find a recall and the vehicle was nine years old they thought it was not thier problem. I think the problem could hav e resulted in a serious accident at high speeds and could have killed me. I paid for the repair but told them they should check ihto the problem becuase of the safety issue but did not receive a positive response. I feel the problem should be researched and I would like feed back on any information that would result from the research.