| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | A | Subwoofer speaker 1 voltage signal | Subwoofer speaker |
| | | |
| 2 | A | Subwoofer speaker 2 voltage signal | Subwoofer speaker |
| | | |
| 3 | A | LH rear loudspeaker voltage control Touring LH rear loudspeaker ground control | Left rear speaker |
| | | |
| 4 | A | Radio ON/antenna signal | Radio |
| | | |
| 5 | E | RH rear loudspeaker ground control Touring RH rear loudspeaker voltage control | Right rear speaker |
| | | |
| 6 | E | Saloon only Subwoofer speaker 4 negative signal | Subwoofer speaker |
| | | |
| 7 | E | Saloon only Subwoofer speaker 3 negative signal | Subwoofer speaker |
| | | |
| 8 | E | Terminal 30 | Fuse F56 |
| | | |
| 9 | E | Subwoofer speaker 1 negative signal | Subwoofer speaker |
| | | |
| 10 | E | Subwoofer speaker 2 negative signal | Subwoofer speaker |
| | | |
| 11 | A | Touring LH rear loudspeaker voltage control | Left rear speaker |
| | | |
| 12 | A | RH rear loudspeaker voltage control Touring RH rear loudspeaker voltage control | Right rear speaker |
| | | |
| 13 | E | Saloon only Subwoofer speaker 4 voltage signal | Subwoofer speaker |
| | | |
| 14 | E | Saloon only Subwoofer speaker 3 voltage signal | Subwoofer speaker |
| | | |
| 15 | M | Terminal 31 | Ground point |
| | | |
| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | | Not used | |
| | | |
| 2 | E | Low frequency negative signal | Transceiver/charging electronics Basic interface, telephone |
| | | |
| 3 | | Not used | |
| | | |
| 4 | | Not used | |
| | | |
| 5 | E/A | I-bus signal line | Splice X18344 |
| | | |
| 6 | | Not used | |
| | | |
| 7 | | Not used | |
| | | |
| 8 | E | RH front loudspeaker ground control | Radio |
| | | |
| 9 | E | LH front loudspeaker ground control | Radio |
| | | |
| 10 | | Not used | |
| | | |
| 11 | A | Low frequency voltage signal | 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 | RH front loudspeaker voltage control | Radio |
| | | |
| 18 | E | LH front loudspeaker voltage control | Radio |
| | | |
| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | A | LH front woofer voltage control | Left front speaker |
| | | |
| 2 | A | LH front woofer ground control | Left front speaker |
| | | |
| 3 | | Not used | |
| | | |
| 4 | A | RH front medium-range speaker ground control | Right front speaker |
| | | |
| 5 | A | Left front mid-range speaker voltage control | Left front speaker |
| | | |
| 6 | | Not used | |
| | | |
| 7 | | Not used | |
| | | |
| 8 | | Not used | |
| | | |
| 9 | A | RH front medium-range speaker voltage control | Right front speaker |
| | | |
| 10 | A | Left front mid-range speaker ground control | Left front speaker |
| | | |
| 11 | A | Positive activation, rear right medium-range speaker/tweeter | Right rear speaker |
| | | |
| 12 | A | RH front tweeter voltage control | Right front speaker |
| | | |
| 13 | A | RH front woofer voltage control | Right front speaker |
| | | |
| 14 | A | LH front tweeter voltage control | Left front speaker |
| | | |
| 15 | A | LH front tweeter ground control | 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 | RH front tweeter ground control | Right front speaker |
| | | |
| 26 | A | RH front woofer ground control | Right front speaker |
| | | |