All passenger cars were air conditioned. The passages between the cars were wide and without doors, the seat pitch of 102 (second class) and 111 cm (first class) was larger than on any other German train. Furthermore, the doors were unusually wide and featured steps that deployed automatically when the doors were opened to make entry as convenient as possible, and the glass doors dividing the two major areas of the intermediate cars were opened by proximity sensors. The ICE 1 was the first German train in which smokers and non-smokers were separated not into different parts of the same car, but to different cars altogether.