Just finished importing a 2006 A4, as of today. Assuming that the car can be imported (check
www.riv.ca) the duty should be 6.0% which was what I was charged about 1 week ago onmy A4. Yes, you also have to pay GST as well to Rev Can at the border, in addition to the duty. You'll haveto pay PST (8%) when you get the car licenced in Ontario (after your Fed/Prov inspections)