| Number | X-pin, colour | Description |
|---|---|---|
| X1819 | 9-pin, Black | Plug connector Water valve relay, rear compartment air conditioning |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | Not used | ||
| 2 | E | Voltage supply terminal 30 | Rear compartment blower relay |
| 3 | Not used | ||
| 4 | E | Voltage supply terminal 30 | Rear compartment blower relay |
| 5 | Not used | ||
| 6 | A | Terminal 87 | Water valve, rear compartment air conditioning |
| 7 | Not used | ||
| 8 | M | Control unit ground | Rear compartment heater/air conditioner |
| 9 | Not used | ||