It appears possible upgrades to exhaust systems may be along soon (google Proventia) Very few zones permit upgrades as yet. Some countries like France go off date of first registration. Costs being mentioned could be in the region of €5000, so really only worth it for high-value vehicles. Not found anything relating to Fiat vans yet.Wonder if a vehicle could be re classed say it was a 2007 euro 5 say you drop a bang up to date new euro 6 engine into it wonder if you could get it re classified as a Euro 6 probably have to change few other bits Ecu exhaust maybe.
Also a new green tax to prevent pollen pollution as.xxxxx. million suffer hay fever every dayElectric?, but then some European cities are making noises about particulates from tyres and brakes.