The buttons for the elevator in the station of Königsdorf on the upgraded line Cologne-Düren (ABS 4) seen on 15 August 2001. The lower button is for people in wheelchairs. Both buttons are equipped with Braille-letters, so it is useable for blind people, people in wheelchairs and even blind people in wheelchairs. The red inscription says "Do not use elevator in case of fire", this makes sense for elevators in houses, but here isn't much that could burn apart from the elevator itself (and i think there isn't anyone who would use a burning elevator, even if there is no inscription).
Digital photo by Christoph Schmitz