Know your rights!
Most probably a Sinkie mat that has been employed as driver!
Embassies "DOMESTIC" help do not have diplomatic immunity!
And diplomatic immunity is only on big value items like murder, rape & smuggling, everything else must be settle according to host country's law!
And if they sprout the bullshit of the vehicle belonging to the embassy thus is of sovereign rights then it is your responsibility to ensure that your country do not get invaded and must shoo the cockroach back into the car where he can maintain sovereignty, otherwise public road anyone shall be subjected to the law of the land!