Plenty of room behind, the Sony head unit is a single din at the rear and shorter then the standard media nav. The hardest part is finding the reverse wire from the wiring loom for the input signal to the head unit. Also I have no idea why Renault do not provide a factually correct fuse diagram. I used the interior light/blower for the accessory to power the reverse camera once I had found it. The unit is the Sony XAV-AX5550D.