The fleet of 14 Lint 41 (class 623) and 24 Lint 54 (class 622) trains have been procured by DB Regio for ZSPNV-Süd's South West Diesel Network which, with a term of 22.5 years, is one of the longest regional rail concessions in Germany.
The network covers six lines totaling 196km:
- RB 69 Weinheim - Fürth (Odenwald)
- RB 62 Worms - Hofheim - Biblis
- RB 63 Worms - Hofheim - Lorsch - Bensheim
- RB 35 Bingen - Alzey - Worms
- RB 46 Frankenthal - Freinsheim - Grünstadt - Ramsen (-Eiswoog), and
- RB 45 Neustadt-an-der-Weinstrasse - Bad Dürkheim - Grünstadt - Monsheim
The 42m-long Lint 41 seats 113 passengers while the 42m-long Lint 54 seats 162. The 140km/h DMUs meet TSI-PRM standards for passengers with reduced mobility and each train is equipped with an accessible toilet.
The new trains are being ordered as part of the Rheinland-Pfalz-Takt 2015 programme to improve rail services in the region and will replace 20-year old DB Regio class 628 DMUs currently used on these lines.