True USA-spec 500E's will have the VIN start with "WDBEA36".
All non-USA spec 500E's will have the VIN start with "WDB124036".
The last 7 digits of the VIN are simply sequential chassis serial numbers... they increment to B999999, then roll to C000000, C000001, and so on. The A999999-B000000 roll happened around the 1990 model year, the B-C roll happened right around the end of 1993 or beginning of 1994 model year. But there is no logic built into the serial number indicating destination country, etc. That information is kept on file by MB though. View page 10 of
this PDF file for more details on the USA VIN format.
