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Originally Posted by salbmw
HI,
First of all how do I determine which Mk is it on since it has DVD Rom written on the unit. Then how do I replace the natvigation computer. Can I over-write the current system and replace it with current common OS i.e V22.1 or V29.1.
Let me know if you can assist.
Thanks.
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Is not any Mk. It is Japanese, and very different to the European system.
To change it you must remove (and throw away) the Japanese nav computer, and fit a European unit.
For your age E39, I would recommend fitting a Mk4 nav computer.
You will need to change wiring, and fit new connectos. It can be done, I've done it.
Email me privately or PM me and send me photos of what you have , I can supply the very special connectors (new) and provide full instructions for what you have to do.
Jochen