Mercedes-Benz M104 engine

The Mercedes-Benz M104 is a straight-six petrol engine produced from 1989 through 1998. It has a double overhead camshaft design with four valves per cylinder and a crossflow cylinder head, and it replaced the single-cam M103 before the M112 V6 took over from 1997. It was introduced as the 3.0 litre M104 E 30 of 2,962 cc, with KE-Jetronic injection, cylinder specific ignition timing, variable valve timing and cooling jets under the pistons, and was followed in 1992 by the 2.8 litre E 28 and the 3.2 litre E 32. One oddity is the M104.900, a 2.8 litre VR6 built by Volkswagen and sold semi-completed to Mercedes-Benz for the Vito, which is unrelated to the other M104 engines.