Hearings usually will be attended by you and any witnesses, a manufacturer`s representative, any manufacturer witnesses, and the arbitrator. All hearings are open to the public. In most instances, an impartial automotive expert technician will be assigned to assist the arbitrator. The expert may examine the vehicle and give an opinion about the nature of the problem(s) and the effect on the vehicle. The expert`s function is not to provide testimony for either side in the dispute. You should consider whether providing technical testimony from a qualified independent mechanic would add substantial support to your claim.