Updated version (V8) with separated Bluetooth and AUX ports, even by installing the optional Bluetooth module you can use the AUX input. xx (verifiable by holding down the menu button for a few seconds ). USB / SD / AUX Interface for Citroen RT3 VAN (until 2006,until SW 5.xx) This interface can be installed on the Magneti Marelli RT3 navigation system with color screen, the RT3 software version must be up to 5.