Just bought an 2017 Nissan Leaf Tekna. This one had showed 10% to much speed. So when driving 100km/h on the meter, i was only driving 90km/h.
Changed the tyres from 215/50-R17 to 215/60-R17 crossclimate2 and now I'm only off by 1%. And the car looks nicer.
Please bare in mind that fitting snow...