| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | E | Voltage supply, terminal 15 | Fuse F20 |
| | | |
| 2 | E | Voltage supply, terminal 15 | Fuse F20 |
| | | |
| 3 | E/A | K-bus signal line | K-bus connector |
| | | |
| 4 | E | Signal, switch off consumer load | Connector, switch off consumer load |
| | | |
| 5 | A | Left water valve activation | Water valves Left valve |
| | | |
| 6 | A | Right water valve activation | Water valves Right valve |
| | | |
| 7 | A | Relay activation Rear defogger relay | Rear defogger relay |
| | | |
| 8 | A | Supply Heated windscreen washer jets | Heated windscreen washer jets |
| | | |
| 9 | A | Auxiliary water pump activation with independent heating Auxiliary water pump activation With latent heat accumulator: | Auxiliary water pump with independent heating Connector, auxiliary water pump With latent heat accumulator: |
| | | |
| 10 | | Not used | |
| | | |
| 11 | E | Voltage supply terminal 30 | Fuse F23 |
| | | |
| 12 | | Not used | |
| | | |
| 13 | | Not used | |
| | | |
| 14 | A | Relay activation Heating blower relay | Heating blower relay |
| | | |
| 15 | | Not used | |
| | | |
| 16 | A | A/C compressor signal | DME control unit DDE control unit |
| | | |
| 17 | | Not used | |
| | | |
| 18 | | Not used | |
| | | |
| 19 | E | Speedometer (A) output signal | Connector, TD signal |
| | | |
| 20 | M | Control unit ground | Ground connector |
| | | |
| 21 | | Not used | |
| | | |
| 22 | A | Shut-down signal With latent heat accumulator: | Connector, auxiliary water pump With latent heat accumulator: |
| | | |
| 23 | E | Night light signal | Connector, terminal 58g |
| | | |
| 24 | E | Voltage supply terminal 30 | Fuse F23 |
| | | |
| 25 | | Not used | |
| | | |
| 26 | | Not used | |
| | | |
| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | A | Signal, independent heating ON Relay activation Relay for latent heat accumulator | Receiver, independent heating Relay for latent heat accumulator |
| | | |
| 2 | A | Control voltage Blower relay Interface on-board monitor/video module/radio Signal Changeover valve LWS | Connector, blower relay Interface on-board monitor/video module/radio Changeover valve LWS |
| | | |
| 3 | A | Independent heating ON feedback | Independent heating/ventilation control unit |
| | | |
| 4 | A | Sensor signal | NTC resistor, steering angle sensor |
| | | |
| 5 | M | Sensor ground | NTC resistor, steering angle sensor |
| | | |
| 6 | A | Valve activation Shut-off valve LWS | Shut-off valve LWS |
| | | |