Due to the construction requirements, the front of the vehicle is almost flat, while the crash absorbers below are an extension of the side rails. The most prominent characteristic of the vehicle is the graphical appearance of the windscreen, which houses all functional equipment. New to the “Kleinprofil” (small profile) line of vehicles is the arched wagon section, which is 10 cm wider. The space gain allows a comfortable arrangement of the seats and multi-functional areas. The optimised interior panelling and modern lighting make a somewhat small vehicle feel surprisingly spacious. The train will be in service from 2015 on the U1-U4 lines.