Hi turk 1820, I believe you need the Renault kit or similar, as your car has CAN-BUS electrics, and adding the electrics can upset the system if not done properly.
The car I believe is already prewired and the kit just plugs in some where in the LHS storage area, although I think all the panel work needs removed to gain access.
The car should also be programmed by RENAULT to identify that the towbar is fitted and electrics connected, esp if rear parking sensors are also fitted, as this automatically adjusts the "detection cloud" to allow for the towbar and enables the indicator warning beeper.
Hope it helps
