Horn switch, horn and two-tone horn, coil spring
- F350 - coil spring
- H - sound signal switch
- H1 - horn and two-tone horn
- J519 - central control unit for onboard electrical system
- T5c - 5-pin plug connector on the central control unit of the electrical on-board network (brown)
- T8d - 8-pin, coil spring connector
- T41a - 18-pin plug connector on the central control unit of the electrical on-board network (brown)
- 369 - Plug connector, 41-pin, on the switch on the steering column
- 369 - Ground connection 4 in the main wiring harness
- 379 - Ground connection 14 in the main wiring harness
- 672 - ground connection point (housing) 2 on the longitudinal beam, front left