BMW 650i, Switzerland import plus 10% inch

Hello, I bought a BMW 650i E63 in Switzerland. Now I would like to import the vehicle to Germany. In addition come the 19% export turnover tax and 10% customs duties. The 10% customs duties, but should not, because the 6er was manufactured in Germany or not? The seller asked at a BMW branch in Switzerland because of the EUR 1 , but this said that it is a Swiss vehicle, since other bumpers, because of the small license plate etc, deshal b he doesn’t get EUR 1, can that be true? LG