Mercedes-Benz M104 engine

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M104
Overview
Manufacturer	Mercedes-Benz AG
Production	1988–1999
Layout
Configuration	Straight-6 (Except M104.900, refer VW VR6)
Displacement	2.8 L; 170.8 cu in (2,799 cc) M104.94x 3.0 L; 180.6 cu in (2,960 cc) M104.98x 3.2 L; 195.2 cu in (3,199 cc) M104.99x
Cylinder block material	Cast iron
Cylinder head material	Aluminium
Valvetrain	DOHC 4 valves x cyl. with VVT
Compression ratio	9.2:1, 10:1 and 10.5:1 on AMG models
Combustion
Fuel system	Bosch KE-Jetronic (KE-CIS) Bosch LH-Jetronic (LH-SFI) Bosch Motronic (HFM-SFI)
Management	Electronic
Fuel type	Gasoline
Oil system	Wet sump
Cooling system	Water cooled
Output
Power output	193–280 PS (142–206 kW; 190–276 hp) SAE
Torque output	265–385 N⋅m (195–284 lb⋅ft) at 4600 rpm M104.98x
Chronology
Predecessor	M 103
Successor	M 112

The Mercedes-Benz M104 is a automobile straight-six engine produced from 1988 through 1999. It has a double overhead cam design with 4 valves per cylinder, and used a crossflow cylinder head. It replaced the M103 and was replaced by the M112 V6 starting in 1997. The bore spacing on all M104 engines is the same as M103 engines.