The 4-series bus range was first presented in September 1996, when the integral low-floor city bus OmniCity was revealed. Production of the chassis range started in second half of 1997, and by the end of 1998 all worldwide production facilities had changed from 3-series to 4-series. Unlike the 3-series, which was a range of 45 different chassis models, the 4-series is one basic chassis with different modular configurations depending on usage and customer needs. At launch there were a total of seven major configurations, presumably the F HB, K EB, K IB, L IB, L UB, N UA and N UB. These were later followed by the F HA, K UB, L IA, L UA and N UD. The first letter describing the position of the engine, and the last two letters describing areas of use. In marketing of the 4-series, Scania have generally only used the engine position (F/K/L/N), the engine displacement (9/11/12) and the series number (4), which is why we know them as F94, F114, K94, K114, K124, L94 and N94.