Due to the sharp increase in winter tourism in the 1960s, the Furka-Oberalb Railway needed modern locomotives for rack and adhesion operation. The solution was five type Deh 4/4 I baggage railcars. Each of the four axles was powered and had rack drive. The high weight of the power equipment was compensated for by the lightweight construction of the car body.
Although there were five power cars, only four control cars and eight passenger cars were purchased. This meant that four shuttle trains could be formed, each consisting of a power car, two passenger cars and a control car. The fifth power car must therefore be used individually. The vehicles now belong to the Matterhorn-Gotthard Railway, as do the successors of the Deh 4/4 II type. 