Secondary Letters (Deutsche Bahn AG)
The following lower-case letters follow the main letters and describe the technical equipment and fittings of the coach. How the letters are used, is at least partly up to the individual railway company. This overview is based on the system used by the Deutsche Bahn AG:
| m | Passenger coach with a length of more than 24.5 metres, rubber, gangway connectors (except on DDm) |
| l | As m, but without a corridor (currently not in use) |
| n | Local train passenger coach (Nahverkehrswagen) with a length of more than 24.5 metres, open coach with centre aisle in 2nd class (12 notional compartments), centre aisle or side corridor in 1st class, two centre doors, suitable for push-pull operations (36-pole control cable) |
| y | Local train passenger coach with a length of more than 24.5 m, open coach with centre aisle in 2nd class (11 notional compartments), two centre doors, suitable for push-pull operations (34-pole control cable) |
| x | S-Bahn open coach with centre doors, bus bar for current collection, centre doors and high performance brake see also: x coach) |
| p | Open coach with centre doors (pullman type), air-conditioned |
| v | Long-distance coach with fewer (verringerter) compartments (11 instead of 12 on Bm and 9 instead of 10 on Am coaches,6/4 instead of 6/5 on ABm coaches) |
| o | in addition to m: fewer compartments and without (ohne) air-conditioning |
| i | in addition to m: former InterRegio coach |
| formerly: coach with gangway, but no bellows or rubber connectors | |
| c | Coach with compartments, in which the seats can be converted to couchettes ("couchette coach") |
| d | Coach with multi-purpose or bicycle section |
| k | Coach with bistro/kiosk or kitchen section or snack machines |
| a | Coach equipped with automatic door operation (TAV). |
| r | Coach with high-performance brake (Rapid-Bremse) KE-GPR. Only used in combination with n or on mail vans. |
| s | on luggage vans: corridor (Seitengang) |
| on sleepers: Special type (small single- or twin-bed compartments) | |
| b | Coach with equipment for the disabled (behindertengerechte) |
| formerly: coach mit command-control cabling (Befehls-Leitung) | |
| h | Coach which has both a bus-bar and can supply current from its own axle generators |
| also: non-converted local passenger train coaches of Reichsbahn origin | |
| z | Coach with power supply from the bus-bar (no axle generators) |
| u | Coach with 34-pole push-pull control cabling (DR type) |
| uu | Coach with 36-pole push-pull control cabling (DB type) (n includes this feature) |
| q | Driving trailer with 34-pole control cabling (only non-modernised vehicles that don't have a n or y) |
| f | Driving trailer with 36-pole control cabling or time-division multiplexed push-pull control |
| in addition to u: driving car with 34-pole cabling or time-division multiplexed push-pull control |
Read more about this topic: UIC Classification Of Railway Coaches
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