| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | A | Positive activation, front left loudspeaker | Amplifier |
| | | |
| 2 | A | Positive activation, front right loudspeaker | Amplifier |
| | | |
| 3 | | Not used | |
| | | |
| 4 | E | Telephone mute signal | Connector, telephone |
| | | |
| 5 | E | Voltage supply terminal R | Unloader relay terminal R |
| | | |
| 6 | | Not used | |
| | | |
| 7 | E/A | I-bus signal line | Connector X18344 |
| | | |
| 8 | A | Negative activation, front left loudspeaker | Amplifier |
| | | |
| 9 | E | Terminal 30 | Fuse F56 |
| | | |
| 10 | E | Speedometer (A) output signal | Instrument cluster Integrated electronic control unit (IKE) Plug connector, telephone |
| | | |
| 11 | A | Negative activation, front right loudspeaker | Amplifier |
| | | |
| 12 | | Not used | |
| | | |
| 13 | E | Night light signal | Light module |
| | | |
| 14 | | Not used | |
| | | |
| 15 | M | Radio ground | Ground connector |
| | | |
| 16 | A | Radio ON/antenna signal | Amplifier |
| | | |
| 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 USA Navigation control unit |
| | | |
| 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 USA Navigation control unit |
| | | |