Hi All, I have been reading the forum to find out about upgrading the firmware of my Nav unit but, one thing I can't seem to find is what version I should be updating to.

I currently have SW 4-1/20.

Are the firmware upgrades cumulative so can I just upgrade from V22 to the latest V27 or do I need to upgrade one at a time to V23, 24, 25 etc until I get to the latest?

Cheers, Andy

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Cheers Andy
From Down under

2004 4.4i Sport Alpine White
2008 Toyota Land Cruiser Turbo Diesel (on order)
1993 Daihatsu Feroza SXP II