Rt4 Install Into 2011 C5 X7?

[Biohead]

Bit of a strange one some of you might think. I've got a 2011 C5 X7 with the RNEG satnav, but I prefer the older RT4 head unit. (Yes, I would love an RT6 but I have the RT4 sat here). I know older X7's did come with the RT4 but this was quickly replaced by the RNEG.

 

I've fitted the unit and coded it up, but there are a few quirks...

 

1) The screen in the centre of the speedo displays zone not mapped. I've had a look around and it seems for RT6 installs this can be enabled. I have no idea if the RT4 is even capable of outputting the correct info, as I believe cars that came with the RT4 had the older display in the speedo - I've no idea if this even displayed the mapping info.

 

2) There's no control over screen brightness. The rest of the cars panels can still be controlled, but not the sat nav screen.

 

3) Possibly related to the above, the map doesn't change between day/night mode when the headlights come on.

 

I might be clutching at straws here, but does anyone have any experience with this? I really would love to whack an RT6 in, but I can't justify the cost as I'd need the screen too - so I'm going to have a go with this. If anyone is willing to sell one cheap I might be interested though!