I plucked up the courage to attempt the SatNav update.
I took a "known good" 16GB USB key and formatted it FAT32 from my Windows 10 PC.
I signed up for an account at mgtouch.naviextras.com and downloaded the Naviextras toolbox to my Windows 10 PC.
I went back to my MG5, powered it to ready mode and plugged the USB key into the same port you would plug your phone into for Android Auto/CarPlay.
I then went to
Settings/System and tapped
Start on the Update Navigation field.
It took a while but then it asks to prepare the USB stick for the update and I clicked Yes.
View attachment 1560
A short while later it had finished and I clicked OK and switched off the car and unplugged the USB key.
I plugged the USB key into my PC. I then installed and ran the Naviextras toolbox app and entered my previously created account details.
It detected the USB key and found a couple of updates. I clicked to downloaded and installed them on to the key.
It took quite a while to download. I had to make sure my computer didn't go into standby so I wiggled the mouse every now and then.
Eventually it finished saying the update was successful and exited.
I then clicked on the "Safely Remove Hardware"
View attachment 1561 icon on my taskbar and safely ejected the USB Key.
I went back to the MG5 powered it to ready mode again and waited for the screen to fully start up. I then inserted the USB Key in the same port as before and waited until it told me it couldn't find any media files.
I then went to
Settings/System and tapped
Start on the Update Navigation field again. It spent a good ten minutes scanning the USB Key and then eventually it prompted me to update the maps.
Another 10 minutes later and it said update complete. I did a couple of tests, then I powered off the car waited 30 seconds and removed the USB key.
Everything seems ok. I did a few extra tests. The EV charger database appears to be updated .
The update log file on the USB key suggests all the POI and maps were updated.
N.B. If you are going to do this I would suggest giving the media unit time to start up and shutdown before plugging-in and unplugging the USB key. I'd also recommend safely ejecting the USB key from your computer rather than just unplugging it (as just unplugging can corrupt the FAT32 filesystem, which could cause errors). And most importantly of all, make sure you have a good quality, "known good" USB key over 8GB in size.
Naviextras.com - Map updates for your navigation device and more...
Naviextras.com - Map updates for your navigation device and more...