Injection and Ignition System of the M 104 and M 119 Engines

The electronic fuel injection and ignition control units on the engines of the new Mercedes-Benz SL roadsters were further developed on the basis of the tried and tested control units. Introducing a communication interface between both ECU's has permitted coordinated functions such as maximum speed limitation. The ignition control unit contains an adaptive closed-loop anti-knock control algorithm for each individual cylinder.