The following information is not entirely correct. I actually own a euro spec 07 a4 s-line tdi. I will be unloading it from the dock in Georgia 1/30/12. Though it has been difficult it has not been "virtually impossible" as the author has stated. Any questions? Please ask. Importing a Euro spec Audi A4 TDI To address a common question I get, unless you're a diplomat, it's virtually impossible to import a recent European spec car without massive modifications unless the exact same car/engine was sold in the US.* As a rough summary, you would have to modify the safety equipment, emissions equipment and tuning, and submit compliance documentation.* It would be cheaper to move to Europe than import a Euro only car and make it street legal.* Audi, BMW, Porsche, etc. have European delivery programs which let you import your car as a used car into the USA but you're importing a US spec car, not a European spec car.* It must be federally certified regardless of what your local DMV gives you or else it'll go to the crusher if the feds finds out.* The only way to currently make your own late model Audi A4 TDI is to swap the 3.0 engine and emissions system out of an Audi Q7 and into an A4.* The engine swap should be relatively easy because these engines are designed to fit into European Audi A4 but the emissions system requires engine tuning and custom fabrication.* See 1000q: DPF and Adblue FAQ for more details on the emissions system on clean diesels.