Cab, engines, axles or transmission – compared with the LP series almost everything was new on the New‑Generation Mercedes‑Benz cab‑over‑engine trucks. The modular system based on the 400 engine model series permitted the use of V‑engines with six, eight or ten cylinders. First available from 1985 the OM 423 was used mainly for construction haulage. It was an absolute rarity in semitrailer trucks.
The long-distance cab was fitted with a completely closed floor and a gearshift system for which the gearshift linkage extended like a telescope when the cab was tilted. This design provided for particularly good noise insulation.