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Originally Posted by PC_X5_Oz
Hi,
I would like to add Nav and am contemplating buying a used MKIV from a seller on ebay UK. It has apparently been updated to the latest 29 firmware.
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Nav firmware is easy to update, so this will be the least of your worries with a new unit, and won't add any value to it, except perhaps telling you that it's indeed a MKIV and that it's been working recently (i.e. since v29 was released)
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Originally Posted by PC_X5_Oz
Will this unit run any and all Australian MAP CDs/DVD's?
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Yes, MKIV will run Australian maps, which are CD-based.
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Originally Posted by PC_X5_Oz
BMW Sydney inform me that MKIV has never been sold in Australia, sould I stick with the MKIII?
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No, they are wrong about MKIV.
Given the information the dealer has given you so far, I'd do some more research before going ahead, as this is a fairly big and complex DIY project you're taking on...