| Number | X-pin, colour | Description |
|---|---|---|
| X1820 | 2-pin, Black | Plug connector Shutoff valve, rear compartment air conditioning |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Voltage supply terminal 30 | Rear compartment blower relay |
| 2 | M | Control unit ground | Rear compartment heater/air conditioner |