Mk4 sat/nav in range rover. lost aux heating

[rangie]

Hello people,
I have joined this forum to try and get some information with regards my range rover Mk4 sat/nav. Since i fitted the Mk4 unit i have lost the aux heating option, i have the aux ventilation but will never use it. I have been told by Kiwi jochen that i will need the navcode and an interface unit to program the Mk4 unit to my range rover system. Is there anyone out there in the UK who can assist with the reprogram, someone who has the navcode and an interface unit which can be linked into the Ibus. All i did was purchase the Mk4 unit and fit it, being told it would work like normal and have all the same options, but it doesn't, all in all the unit requires programming to my Range rovers system, any help would be appreciated.