Very Interesting spot. The plate on the AMG C 63 is more than likely a short-term transit plate, made to look like a 'standard' German plate, since these 'official services/consulate' plates never have a leading zero in their number sequences (short term transit plates almost always have their number sequences starting in 03 or 04). Seeing as the Swedish plate on the caravan also is assigned to an older Mercedes E-class, I think something very doubious is going on here!