| Number | X-pin, colour | Description |
|---|---|---|
| X637 | 6 -pin, Yellow | Plug connector Right rear seat heating switch |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Night light signal | Connector, night lights |
| 2 | A | NTC signal | Right rear seat heating |
| 3 | E | Terminal 15 | Fuse F63 |
| 4 | M | Ground | Ground connector |
| 5 | A | Signal, seat heating on | Right rear seat heating |
| 6 | A | Signal, backrest heating on | Right rear backrest heating |