| 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 | A | Positive activation, rear left loudspeaker | Amplifier |
| | | |
| 4 | E | Telephone mute signal | Telephone |
| | | |
| 5 | E | Voltage supply terminal R | Unloader relay terminal R |
| | | |
| 6 | A | Positive activation, rear right loudspeaker | Amplifier |
| | | |
| 7 | E/A | I/K-bus signal link | Connector, I/K-bus |
| | | |
| 8 | A | Negative activation, front left loudspeaker | Amplifier |
| | | |
| 9 | E | Terminal 30 | Fuse F64 |
| | | |
| 10 | E | Speedometer (A) output signal | Instrument cluster Integrated electronic control unit (IKE) |
| | | |
| 11 | A | Negative activation, front right loudspeaker | Amplifier |
| | | |
| 12 | A | Negative activation, rear left loudspeaker | Amplifier |
| | | |
| 13 | E | Night light signal | Light module |
| | | |
| 14 | A | Negative activation, rear right loudspeaker | Amplifier |
| | | |
| 15 | M | Radio ground | Ground connector |
| | | |
| 16 | A | Radio ON/antenna signal | Amplifier |
| | | |
| 17 | | Not used | |
| | | |