Final coding interface that will convert a HZ9 auxiliary heater code to a H12 auxiliary heater code Simply connect the adapter to the vehicle's OBD interface - Done! The interface activates the auxiliary heater menu in the navigation system as well as the manual start button An optional retrofitting of the original remote control is also possible The package includes: 1x Coding Dongle Note: The diagnostic interface can only be used for one vehicle Suitable for the following models with the code HZ9 (auxiliary heating)