| Number | X-pin, colour | Description |
|---|---|---|
| X1561 | 4-pin, Black | Plug connector Steptronic switch |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | M | Terminal 31 | Ground connector |
| 2 | A | Downshift signal | AGS transmission control unit |
| 3 | A | Upshift signal | AGS transmission control unit |
| 4 | E | Signal, lights switch panel | Gear indicator light |