S-Bahn Stuttgart, accompanied by several problems: Following the conversion of the S7 in May 2014, a design error in the wheelchair ramp caused an accident in which a ramp slipped out of the train due to the lack of barbs during use, severely injuring a wheelchair user. Further use of the ramps was subsequently banned until further notice. However, as many platforms in the network are not high enough to disembark a wheelchair user without a ramp and handlers are not allowed to pick them up by hand, the DB Station & Service transport line had to be alerted to a mobile Ramp to bring the scene, which sometimes took several hours. In contrast to the 423 series, where only the ramp request buttons are directly behind the driver's cab used, all the request buttons were always active in the 430 series and were often groundless, resulting in each of the multi-purpose areas of the engine being challenged by the driver Train (depending on train length up to six pieces) on wheelchair users with exit request had to control, so that the trains quickly large delays collected and prematurely reversed, failed completely or were replaced on the way by older vehicles. This problem was particularly frequent after the S1 was converted to the new railcars, which drastically reduced line reliability in the early weeks. The fact that the wheelchair pushbuttons were now also attached to all doors and could easily be actuated accidentally further compounded the problem. After no other solutions led to success, starting in September 2014, all wheelchair push-buttons located in the door frame were removed. In the first winter of operations, there were other problems: As a result of inadequate heating of driver's cabs and particularly loud noise-related annoyance reports in enormous frequency in January 2015 so many train drivers were sick leave that the line S4 had to be set for several days. Further S-Bahn With the official start of operation of the S-Bahn Rhein-Main in 1978, the lines on which still "normal" trains reversed were marked in the traffic plan of the FVV as S-Bahn, so that there the lines S7, S9 and S11 to S14 were recorded. These trains also run at regular intervals as far as the intercommunication with the long-distance traffic. Excluded was only the route to Dietzenbach, which was designated as R10 and was shut down a few years later; this