| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | A | Positive signal, subwoofer speaker 1 | Subwoofer speaker |
| | | |
| 2 | A | Positive signal, subwoofer speaker 2 | Subwoofer speaker |
| | | |
| 3 | A | Positive activation, rear left loudspeaker Touring Negative activation, rear left loudspeaker | Left rear speaker |
| | | |
| 4 | A | Radio ON/antenna signal | Radio |
| | | |
| 5 | E | Negative activation, rear right loudspeaker Touring Positive activation, rear right loudspeaker | Right rear speaker |
| | | |
| 6 | E | Saloon only Negative signal, subwoofer speaker 4 | Subwoofer speaker |
| | | |
| 7 | E | Saloon only Negative signal, subwoofer speaker 3 | Subwoofer speaker |
| | | |
| 8 | E | Terminal 30 | Fuse F56 |
| | | |
| 9 | E | Negative signal, subwoofer speaker 1 | Subwoofer speaker |
| | | |
| 10 | E | Negative signal, subwoofer speaker 2 | Subwoofer speaker |
| | | |
| 11 | A | Touring Positive activation, rear left loudspeaker | Left rear speaker |
| | | |
| 12 | A | Positive activation, rear right loudspeaker Touring Positive activation, rear right loudspeaker | Right rear speaker |
| | | |
| 13 | E | Saloon only Positive signal, subwoofer speaker 4 | Subwoofer speaker |
| | | |
| 14 | E | Saloon only Positive signal, subwoofer speaker 3 | Subwoofer speaker |
| | | |
| 15 | M | Terminal 31 | Ground point |
| | | |
| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | | Not used | |
| | | |
| 2 | E | Negative signal, low frequency | Transceiver/charging electronics Basic interface, telephone |
| | | |
| 3 | | Not used | |
| | | |
| 4 | | Not used | |
| | | |
| 5 | E/A | I-bus signal line | Connector X18344 |
| | | |
| 6 | | Not used | |
| | | |
| 7 | | Not used | |
| | | |
| 8 | E | Negative activation, front right loudspeaker | Radio |
| | | |
| 9 | E | Negative activation, front left loudspeaker | Radio |
| | | |
| 10 | | Not used | |
| | | |
| 11 | A | Positive signal, low frequency | Transceiver/charging electronics Basic interface, telephone |
| | | |
| 12 | | Not used | |
| | | |
| 13 | E | Telephone mute signal | Transceiver/charging electronics Basic interface, telephone |
| | | |
| 14 | | Not used | |
| | | |
| 15 | E | Telephone ON signal | Transceiver/charging electronics Basic interface, telephone |
| | | |
| 16 | | Not used | |
| | | |
| 17 | E | Positive activation, front right loudspeaker | Radio |
| | | |
| 18 | E | Positive activation, front left loudspeaker | Radio |
| | | |
| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | A | Positive activation, front left woofer | Left front speaker |
| | | |
| 2 | A | Negative activation, front left woofer | Left front speaker |
| | | |
| 3 | | Not used | |
| | | |
| 4 | A | Negative activation, front right medium-range speaker | Right front speaker |
| | | |
| 5 | A | Positive activation, front left mid-range speaker | Left front speaker |
| | | |
| 6 | | Not used | |
| | | |
| 7 | | Not used | |
| | | |
| 8 | | Not used | |
| | | |
| 9 | A | Positive activation, front right medium-range speaker | Right front speaker |
| | | |
| 10 | A | Negative activation, front left mid-range speaker | Left front speaker |
| | | |
| 11 | A | Positive activation, rear right medium-range speaker/tweeter | Right rear speaker |
| | | |
| 12 | A | Positive activation, front right tweeter | Right front speaker |
| | | |
| 13 | A | Positive activation, front right woofer | Right front speaker |
| | | |
| 14 | A | Positive activation, front left tweeter | Left front speaker |
| | | |
| 15 | A | Negative activation, front left tweeter | Left front speaker |
| | | |
| 16 | A | Negative activation, rear left medium-range speaker/tweeter | Left rear speaker |
| | | |
| 17 | | Not used | |
| | | |
| 18 | | Not used | |
| | | |
| 19 | A | Positive activation, rear left medium-range speaker/tweeter | Left rear speaker |
| | | |
| 20 | | Not used | |
| | | |
| 21 | | Not used | |
| | | |
| 22 | | Not used | |
| | | |
| 23 | | Not used | |
| | | |
| 24 | A | Negative activation, rear right medium-range speaker/tweeter | Right rear speaker |
| | | |
| 25 | A | Negative activation, front right tweeter | Right front speaker |
| | | |
| 26 | A | Negative activation, front right woofer | Right front speaker |
| | | |