 The Mercedes-Benz 600 from 1964, the first post-war "Grand Mercedes", is powered by the Mercedes-Benz M100 engine.The automatic transmission was replaced by a three planetary gearset design to handle the much higher torque of the big block V8 engine and to meet the much higher standards of luxury vehicles.The K4C 025 (type 722.2) was the core model of the first automatic transmission series from Mercedes-Benz.