It was meant to be a Mini adventure; it nearly became a major embarrassment.
But the royals had not embarrassed their hosts, they had been waved through by German officers who had also blocked off part of the road.
With photographers and police in tow, driver Eugenie and her older sister Beatrice then took a swift right into the safety of the British embassy compound.
At least the 22 and 24-year-old sisters did not have to decide which side of the road to drive their Mini on. The entire 500-metre staged tour was along one-way streets.