Steering column lever, turn indicator/high-beam switch
The steering-column lever on the left of the steering column has the following functions:
- High beam assistant button
- On-board computer button
- Turn indicator
- Headlight flasher
The following illustration shows an example of a drop arm turn signal/high beam switch.
| Item | Explanation |
|---|---|
| 1 | High beam assistant button |
| 2 | On-board computer button |
| 3 | High-beam headlight |
| 4 | Triple turn signal, right-hand turn indicator |
| 5 | Continuous flashing, right-hand turn indicator |
| 6 | Headlight flasher |
| 7 | Triple turn signal, left-hand turn indicator |
| 8 | Continuous flashing, left-hand turn indicator |
The steering column switch cluster generates the switching signals based on the drop arm's respective position. The switching signals are made available by the steering column switch cluster via the local interconnect network bus.
The footwell module (FRM) or front electronic module (FEM) or Body Domain Controller (BDC) receives the requests of the turn signal/high beam switch as well as the button for the high-beam assistant.
Pressing the onboard computer button in an axial direction triggers the requests for the onboard computer. The steering column switch cluster transmits the commands to display the on-board computer functions via the local interconnect network bus.
In the case of vehicle equipment without the high-beam assistant, the button on the steering column stalk turn indicator/high-beam switch is not required. A large button is used instead.