| Number | X-pin, colour | Description |
|---|---|---|
| X1821 | 2-pin, Black | Plug connector Water valve, rear compartment air conditioning |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Voltage supply terminal 30 | Water valve relay, rear compartment air conditioning |
| 2 | M | Ground | Ground connector |