The range shown in EU( and outside, like UK
) is still the EPA range, or close to that. My M3P shows 507km at full charge but WLTP is 567km. 507km happens to be the EPA range 315miles).
Anyway, WLTP is only a comparison between different vehicles and it isnt close to any real driving at all. Even though WLTP is told to be less optimistic than the old NECD-ranges, WLTP still is more or less a dream. It might be possible to resch the WLTP range during summer with the AC off, and creeping slow speeds( average speed in the WLTP-cycle is 46.5km/h or 29mph). So even if its possible, yoe really wouldnt like to se the WLTP range on the screen. Its an utopia.
The EPA range is also actually only for comparison but less utopic, and you can actually reach that range if you drive slow and economic.
For the fully charged range, its 353 miles EPA range in USA but the battery is limited due to the fact that they use a smaller LG battery for some cars. So the max charge range is most often said to be about 545 or 325miles. Looks like your car shows the same range.
Do you k ow if your car has the Panasonic(E3D) or the LG(E5D) battery ?