Hey Guys, i have imported an US Audi TT to EU. So i have called Audi (Europe) to send me an Data Sheet from my Vehicle. On this paper is written, that the Audi TT have an Emission Standard EU4. EU4 is an old standard here in Europe, all vehicles younger 2011 must have euro 5 standard. So my question, how this can be, i thought,that us cars must have a very high standard (the highest in the world), especially California. And the Audi TT is certified for the state California!? May be someone could help me?