The German messages appearing on the dashboard of Richard Hammond's Cadillac include bremsbeläge erneuern (renew brake pads), motoröl wechseln (change engine oil) and Geschw. grenze 145 (speed limit 145).
James May's S-class was the first type of car to have double glazed windows and metal poles that popped out of the rear wings to assist with reversing. The poles became obsolete soon after with the invention of parking sensors.
The door factory was set up because China finishes a new skyscraper every five days.
The Beipanjiang Bridge is the world's highest bridge. China is also home to the second and third highest bridges in the world.
The 24-curve road is 4 kilometres long and climbs 260 metres. Before the road was built in 1935 strategic supplies had to be flown into China over the Himalayas. This method was so perilous a total of 468 planes crashed trying to make the flight.