PARIS, Jan 14 (Reuters) - A French mechanic in the Dakar rally has died in an accident involving an assistance vehicle and a local truck in Saudi Arabia, the Dakar rally organisers said on Friday. Rally organisers said the driver was French national Quentin Lavalee, who was driving a car belonging to the team PH Sport. His passenger, Belgian national Maxime Frere, was injured and was transported to hospital in Jeddah.