I updated the maps in my previous DS4... I purchased and downloaded them from the Citroen Navigation website onto a PC then put them on a USB. It was a painless process, but uploading the new maps to the car took quite a while, about an hour if I remember correctly.
Each of the various maps for Europe had to be uploaded individually which in itself would have been OK if it were not necessary to have the engine running the whole time, meaning that I didn't want to leave the car unattended.
I guess the dealer will want to charge for the time it takes to do the update, so might be cheaper and easier to do it yourself, in my opinion.
Yikes that's a fair block of time.
I bet updates for Australia, if there are any, are smaller.
It's a massive country but there ain't many roads. ˜� Even fewer good ones !
And it's not likely that New Zealand or the Pacific Islands would be rolled into it. Somewhat impractical seeing as you can't drive to them. I'll have to try that out - entering some NZ or Fiji addresses.
I know it sounds weird having to leave the car running but you need to ensure that during the upgrading of most memory based systems that power is not lost.
"Bricking" the Sat/Nav might not be good.
Who knows how integrated the SatNav /GPS functions are in the car. E.g these days you could use the GPS data to alter the timing and fuel/air mix to compensate for altitude etc.