Hi, my first post! We are due to go see a used s line this weekend. Its a 15 plate 1.4 but appears it has the higher road tax of £120 as opposed to £30. Looking at packers website it looks like the higher taxed engine stopped production January 15. Does anyone know the difference in the engine? Anything I should be concerned about? Also anything else that u should be checking on a 3 year old model? I'm guessing as it's the older engine it must have been manufactured late 2014.