The Mercedes that Danny Corbo tried to steal has no front number plate, which is illegal in Ireland.
Car registration plates. When they're in Dublin, the Range Rover's plate is 847-D-6654 and the Audi's is 623-D-6254. While Ireland has three digits at the start since 2013, the three digits indicate the year and the half of the year the car was registered, as in 131 being the first six months of 2013, and 202 being the second 6 months of 2020.
Peter Swann refers to "what happened in Guiana/Guyana". Guyana is not the same as French Guiana. While both are on the north coast of South America, Guyana is an independent country (and used to be British Guyana), and French Guiana is an overseas department of France.