How far does diplomatic immunity cover ambassadors. Or at least their driver.

Was in Makati this morning and noticed that the Argentina Ambassador's Dar Blue Volvo (Had little flag and 1000 plates - isn't that Ambassador's plate?) was zooming down one of the one-way streets of Salcedo village. It made several other approaching cars get out of the way in the tight street and was a traffic hazard. I suppose diplomatic immunity has its privileges. Does that immunity transfer to the driver as well? It seemed he was the only one in the car.