In Eisenach (home of the IFA Wartburg car factory) they heard about how the Japanese test a car. They put a cat in the car, and if after three days the cat is dead, the parts are judged to be close fitting. Not wanting to be second in anything, the people in Eisenach decided to test the Wartburg in a similar fashion. If after three days the cat is still in the car, the parts are judged to be close fitting.