The invention concerns a data bus system (30) including a communication unit (40) for bidirectional wireless communication with at least one unit (20) outside of the vehicle (10) and with vehicle units (50, 60, 70, 72, 74, 76, 78, 80, 90, 110, 120, 130, 140) which are in data transmission communication with the communication unit (40) via at least one data bus (150, 152, 154), wherein data as to status of the vehicle units (50, 60, 70, 72, 74, 76, 78, 80, 90, 110, 120, 130, 140) is transmitted via the at least one data bus (150, 152, 154) to the communication unit (40) and transmittable via the communication unit (40) to at least one unit (20) outside the vehicle. According to the invention, a triggering event (E) is received by the vehicle units (50, 60, 70, 72, 74, 76, 78, 80, 90, 110, 120, 130, 140) via at least one data bus (150, 152, 154), and the vehicle units (50, 60, 70, 72, 74, 76, 78, 80, 90, 110, 120, 130, 140) upon receipt of the triggered event (E) transmit their status data via the at least one data bus (150, 152, 154) to the communication unit (40).