Get it here:

(Fresh from this morning)
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Original Range Rover OS, Mode2Form1, contains Mk3 version 3-1/32

This is the last version ever released for the Rover nav system, and dates fro April 2003

NOTE: check your OS before updating. Look in the top right of the Settings screen
If you already have 3-1/32 then do not try an update because it won't change anything, and carries the risk that you will break the nav

thanks kiwi, we cant even access the menu at the moment it just says insert disc when we put the headunit onto satnav..

Do you know if a 'CDkey' disc will be required I have read about these being needed for some MKIIIs?

Many thanks

So your nav is waiting for an OS disc. So insert it the OS disc.

You are mixing up BMW Mk3 with LRO Mk3.

No key CD is required for LRO Mk3 navs.

Is this Rover 75 with 0-41 eligable for an 1-31 upgrade? Or is this 1-41?

That looks like a Mk2 nav. But it might be a Mk3

It has x-1/41 software loaded

To find out the x, identify the nav in the boot, or read the software version from the settings screen

I'm embarrased to say I couldn't get into any other settings screen. I held buttons down and couldn't find any other settings menu .

That is a Mk3 nav

And to let you off, the SET screen is indeed not showing the SW version :-)

You would likely benefit from a RR OS software update.

Original OS disc is here:
Home

Make a CD from the image file using ImgBurn

PS: NavCoder would confirm if it has a RR OS or a BMW OS loaded.
If BMW OS, then update to 3-1/63 and enjoy a much better menu

I forgot to pack my Navcoder interface before leaving!

With the RR OS would I lose the auto day/night mode?

Edit: it's a single tuner 1999 factory install.

What functions/improvements changed with the Range Rover code? It's not my car and I don't want to upset the owner by downgrading his setup.

Don't know, try it.

Don't know, never saw a Rover,

As it is not your car. if you have any concerns, don't touch it.