The Mercedes-Benz 300 SL-24 was a variant of the R129 SL-Class that was introduced for the 1990 model year. The 300SL-24 was only offered in a convertible body style and was powered by Mercedes' M104 engine. This 24 valve engine (thus the 24 in the model series name) was a 3.0L inline six that had an output of 228hp. This power was sent to the rear wheels via a 4 speed automatic or 5 speed manual transmission. Production of the R129 Mercedes-Benz 300SL-24 ended in 1993.