| Other Name: | Ringbahn |
| System: | Berlin S-Bahn |
| Locale: | Berlin |
| Operator: | S-Bahn Berlin GmbH |
| Stock: | DBAG Class 481 DBAG Class 483 DBAG Class 484 |
| Electrification: | 750 V DC Third rail |
| Map State: | uncollapsed |
S41 and S42 operate a circular service on the Ringbahn and are part of the Berlin S-Bahn. The S41 operates clockwise around the circle, the S42 operates counter-clockwise.[1]