Skoo

Hello, I've recently bought an Octavia 1.4tsi that has been imported from Finland and only now I've noticed that navigation shows an arrow on a completely white screen, I tried to zoom out but no roads show up. Do I need to update it? Does different country mean you need to switch maps? Another thing, I've noticed that when I turn on Webasto, it seems to work, but I'm not sure how to make it so it turns on heater vent and window defroster. Also, after a while inside the car you can smell gasoline, so for safety reasons I stopped using it. Right now with bad weather outside I can't really jack up the car to get to the webasto to see for myself if there's a leak, or maybe there is a common weak point somewhere? Thanks for help