| Number | X-pin, colour | Description |
|---|---|---|
| X18126 | 17-pin, black | Plug connector N9 Radio/stereo |
| X18805 | 10-pin, black | Plug connector N9 Radio/stereo |
| X01037 | 10-pin, black | Plug connector N9 Radio/stereo |
| X01131 | 1-pin | Plug connector N9 Radio/stereo |
| X01127 | 1-pin | Plug connector N9 Radio/stereo |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | A | Positive activation, front left loudspeaker | Left front speaker |
| 2 | A | Positive activation, front right loudspeaker | Right front speaker |
| 3 | A | Positive activation, rear left loudspeaker | Left rear speaker |
| 4 | E | Telephone mute signal | Transceiver/charging electronics |
| 5 | E | Voltage supply terminal R | Unloader relay terminal R |
| 6 | A | Positive activation, rear right loudspeaker | Right rear speaker |
| 7 | E/A | I/K-bus signal link | Integrated electronic control unit (IKE) |
| 8 | A | Negative activation, front left loudspeaker | Left front speaker |
| 9 | E | Terminal 30 | Fuse F69 |
| 10 | E | Speedometer (A) output signal | Integrated electronic control unit (IKE) |
| 11 | A | Negative activation, front right loudspeaker | Right front speaker |
| 12 | A | Negative activation, rear left loudspeaker | Left rear speaker |
| 13 | E | Night light signal | Light module |
| 14 | A | Negative activation, rear right loudspeaker | Right rear speaker |
| 15 | M | Radio ground | Ground point |
| 16 | Not used | ||
| 17 | Not used | ||
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | A | Positive activation Audio cassette right | On-board monitor |
| 2 | M | Negative activation Audio cassette right | On-board monitor |
| 3 | Not used | ||
| 4 | Not used | ||
| 5 | M | Negative signal, low frequency | Video module |
| 6 | A | Positive activation Audio cassette left | On-board monitor |
| 7 | M | Negative activation Audio cassette left | On-board monitor |
| 8 | Not used | ||
| 9 | Not used | ||
| 10 | M | Positive signal, low frequency | Video module |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | A | Positive signal, low frequency left | CD changer |
| 2 | A | Positive signal, low frequency right | CD changer |
| 3 | M | Shield | Audio shield |
| 4 | Not used | ||
| 5 | Not used | ||
| 6 | A | Positive signal, low frequency left | CD changer |
| 7 | A | Positive signal, low frequency right | CD changer |
| 8 | Not used | ||
| 9 | Not used | ||
| 10 | Not used | ||
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Antenna signal | Diversity |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Antenna signal | Radio clock receiver Japan Vics receiver |