The kit consists of an indicator panel with 12m cable and an BCM electronic unit.The BCM electronic unit transmits the signal from the CSM, coupling sensor to the indicating panel in the cab. A green light shows when the coupling is closed and secured, and a red light shows when the coupling is open. Both lights show to confirm the function when the ignition is switched on. The green light can be turned off by pushing the button so that the driver will not be disturbed when driving. The VBG Indicating Kit is a complete digital network (CAN-BUS) that meets the requirements of UNECE R55. The system handles all communication between the truck coupling and driver. It is an easy-to-install modular system which allows for future functional expansion.