| Number | X-pin, colour | Description |
|---|---|---|
| X1824 | 4-pin, Black | Plug connector Output stage, rear compartment air conditioning |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Signal Output stage, rear compartment air conditioning | Rear compartment heater/air conditioner |
| 2 | E | Voltage supply, terminal 15 | Rear compartment blower relay |
| 3 | M | Control unit ground | Rear compartment heater/air conditioner |
| 4 | M | Ground | Ground connector |