| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | A | Voltage supply Drive unit for towing hitch release | Drive unit for towing hitch release |
| | | |
| 2 | E | Supply, terminal 30G | Fuse F10 |
| | | |
| 3 | | Not used | |
| | | |
| 4 | M | Ground | Ground point |
| | | |
| 5 | M | Ground | Towing hitch release button |
| | | |
| 6 | A | Activation Towing hitch release button | Towing hitch release button |
| | | |
| 7 | A | Switch power supply, end position/locking pin | Drive unit for towing hitch release |
| | | |
| 8 | | Not used | |
| | | |
| 9 | E | Switching signal, end position/locking pin | Drive unit for towing hitch release |
| | | |
| 10 | E | Switching signal, end position/locking pin | Drive unit for towing hitch release |
| | | |
| 11 | E | Terminal 15 | Car access system |
| | | |
| 12 | E | Signal, boot lid contact | Central locking drive, boot lid |
| | | |
| 13 | E | Signal, speaker OFF | Trailer module |
| | | |
| 14 | A | Activation, red LED | Towing hitch release button |
| | | |
| 15 | A | Activation, green LED | Towing hitch release button |
| | | |
| 16 | M | Negative activation Speaker, towing hitch release | Speaker, towing hitch release |
| | | |