The Mercedes-Benz SL320 was a variant of the R129 SL-Class that was introduced for the 1994 model year. The SL 320 was powered by Mercedes' M104 engine which was a 3.2L inline six unit that sent 221hp to the rear wheels via a 5 speed manual or automatic transmission. Production of the SL320 lasted until 2001, when the model series was discontinued with the introduction of the next generation R230 Mercedes-Benz SL-Class.