In 1988, the 3-series was introduced, continuing the main models of the 2-series. In 1990, the new L113 became available, with a longitudinally rear-mounted engine which was inclined 60° to the left, to make a lower height than the K113. The 4-series was launched in 1997, continuing all model characteristics from the 3-series, but with all of them being just modular configurations of the basic chassis. The 8.5-litre engine was replaced by a 9-litre, and the 11-litre was replaced by an 11.7-litre. They were joined by a 10.6-litre engine in 2000.