Reliability is paramount

425 042 and 420 057 in Köblitz. The BR420 was already put out of service on the S-Bahn network around Altenburg a few months ago. However, 10 units are currently kept as reserve in case of a hiccup on the network, like a failed door control unit on 425 042. So, 420 057 and 140 pulled into the adjacent platform track to continue the S1 service to Bad Rinckenburg with around 20 minutes of delay.