Funny, but real - two Piaggio Ape with diplomatic plates:

https://www.vebeg.de/web/de/verkauf/browse.htm?DO_SUCHE=1&SUCH_KAT=02&SHOW_AUS=1- 622320&SHOW_LOS=2&nolistlink=1

https://www.vebeg.de/web/de/verkauf/browse.htm?DO_SUCHE=1&SUCH_KAT=02&SHOW_AUS=1- 622320&SHOW_LOS=3&nolistlink=1

To be precise/correct: consularic plates (CC, not CD)