Cd400 to nav500 upgrade.

[tucpal]

I fitted the interface box to the insignia nav 600 to get the reverse camera option

https://www.vxoc.org.uk/forum/Thread-Mul...ia-astra-j

it can also do other things like add dvd phone pc etc to it
but you need additional boxes adding to it.
so it can get over complicated and your glove box will have to store all the dvd boxs etc

now i did remove this from my car and install the factory rear camera as the interface box was interfering with the TPMS sensors
there is an external power box a small black box on the loom that was the issue i would recommend removing that black box
for that reason you can still make the rear camara work with out the loom from the main loom to the back of the navi you only really need the blue cable for that but as you want to have dvd etc added you would need to keep the black box and may have TPMS sensor loss issues unless you shield the black box to stop RF interference.