it seems there is a nav upgrade for €1200, that usually upgrades screen/speakers in Europe.
It's not a nav upgrade, it's the navigation module for models without sat navigation feature with the 7" screen.
If you want the bigger screen you have to get the Lexus Premium Navigation which is also tied to the upgrade of the audio system.
Also, if appears that Lexus doesn't care about giving CLEAR infos on both their own f*ckin website and the configurator so you actually don't really know what some single optionals include. You see "Lexus Navigation" and you click on "more info" just to see a blank window with the price...what's the point?
It's frustrating because I have to rely on the American Lexus website to discover some little details and features that are not reported by the European websites, it literally makes me cringe.
Stupid example:
If this was a feature on a random Audi/Bmw/Mercedes I could've read like 3 pages on their websites about this thing, Lexus simply doesn't care and it's stupid since they're aiming to considerably increase their sales numbers.
Also their official press announcement openly talks of Washi trim for the dashboard and AVS suspension for the Luxury model, then you go and try to order/configure the car and you realize that Washi is not an option for our market (every UX trim has NuLuxe on the upper dashboard) and AVS are only for F-Sport model.
So, in the end: always ask to the dealer and never fully rely on their configurator which is also full of text refuses that you can find printed even on the dealership quotes (they still haven't find the time to correct "OCHER" in the interior colous list since november).