Mercedes-Benz M166 engine

Mercedes-Benz M166
Overview
Manufacturer	Mercedes-Benz
Production	1997 – 2005
Layout
Configuration	Inline-four engine
Displacement	1.4 L (1,397 cc) 1.6 L (1,598 cc) 1.9 L (1,898 cc) 2.1 L (2,084 cc)
Cylinder bore	80 mm (3.15 in) (M166 E14, E16) 84 mm (3.31 in) (M166 E19, E21)
Piston stroke	69.5 mm (2.74 in) (1.4 L engines) 79.5 mm (3.13 in) (1.6 L engines) 85.6 mm (3.37 in) (1.9 L engines) 94 mm (3.70 in) (2.1 L engines)
Block material	Aluminium alloy
Head material	Aluminium alloy
Valvetrain	SOHC 2 valves x cyl.
Compression ratio	11:1 10.8:1 (1.9 L engines)
Combustion
Fuel system	Multipoint injection
Fuel type	Gasoline
Cooling system	Water cooled
Output
Power output	60–103 kW (82–140 PS; 80–138 hp)
Torque output	130–205 N⋅m (96–151 lb⋅ft)
Chronology
Successor	Mercedes-Benz M266 engine

The M166 is a range of inline-four engines produced by Mercedes-Benz from 1997 to 2005, before it was succeeded by the M266 engine from 2004.

Design[]

The M166 is transversely mounted and features 2 valves per cylinder with multipoint injection.^[1] The engine is used in W168 A-Class models that feature the 'sandwich concept', where the engine is mounted at a 59-degree angle just behind the front axle.^[2] This allows for better weight distribution as well as increased safety, as the engine slides underneath the floorpan instead of into the cabin in the event of a head-on collision.^[3]

Models[]

M166 E14[]

• 1997–2004 W168 A140^[4]

M166 E16[]

• 2001–2005 W639 Vito 1.6
• 1997–2004 W168 A160

M166 E19[]

• 1999–2004 W168 A190
• 2001–2005 W639 Vito 1.9
• 2001-2005 W414 Vaneo 1.9

M166 E21[]

• 2002–2004 W168 A210

References[]