I have a Suzuki SX4 which has a built in touch screen with the garmin sat nav.
I have attached a picture of the device.
I can update it via the Suzuki Garmin site to NT 2014.20, but at a cost of £55
I'm trying to find out if it's possible to update the maps to City Navigator Europe NT 2015.10
The only way I can see to update is via an sd card, but no software is on the card.