JEM is driving on a temporary German plate, registred with an address in the US. While I am not surprised that German police can locate you in Sweden (both countries are in the EU after all), I'd be very surprised if they could go after somebody who lives in the US when the only thing they have is a picture of the license plate. Of course, it's a different story if they stop you on the spot...
Gustav, I'm just back from a trip to Stockholm. M5s seem to be quite popular there -- seen 3 in 4 days. Do you know how it ranks in Europe for its M5 per head ratio?
JEM, I'm flying at the end of the week for a last drive of the beast before I drop it for shipment to the US. I'll be in Southern Germany, Switzerland and the French Riviera. When are you dropping yours and flying back?