What Euro 6 means for you
Euro 6 is the emissions standard that most diesel cars from September 2015 onwards meet. Each Euro number sets tighter limits on exhaust pollution than the one before. For buyers, it matters mainly for London's ULEZ, where a diesel that isn't Euro 6 pays £12.50 a day.
Check the ULEZ status before you buy, because a non-compliant car pays the charge on every day it's driven in the zone: 24 hours, every day except Christmas Day. GetFreeCarCheck's free check shows ULEZ status. Electric cars always comply.