The same 4matic fully functional pickup truck, now with the wireless trailer control system and hitch.
To connect/link the trailer controller to the vehicle/trailer so it functions properly:
1. Ensure your vehicle has a active and charged electrical system or battery
2. Look at the display on the trailer to see what frequency the controller is set to (middle-top of the front on my trailers)
3. Input that number into the keypad located on the vehicle's interior
4. Check that all inputs and lights are working correctly and release the trailer's parking brake override.
You are now ready to go.
