Just had a phone call from the dealer. They've found the Fiat instructions on how to do it. Map update to March 2017 available. They're coming to collect the car tomorrow. Fingers crossed ??
For those of you with the 6.5" 'fancy pants' version, here is how you get your maps updated
Go to https://maps.mopar.eu/en/home and either login or create an account
Enter your VIN number where requested and hopefully you will see a screen resembling this one
Now, the maps are supplied by a company called HERE
The dealer must create a company account with them, if they don't already have one. This takes 3-5 working days to activate (no idea why)
Once this is done the dealer has the Fiat equivalent of a Haynes Manual with step by step instructions on how to do it. It sounds like it's a case of downloading to acUSB stick but we can't do it ourselves.
Voila
So, it won't won't be happening tomorrow but hopefully within the next week. I can't believe that I'm the only Fiat owner round here that wants their maps updated, 2015 is just a tad out of date