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. 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. 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.
Models EngineDisplacementPowerTorqueYearsM166 E14 at 5,000 rpm at 3,750 rpm1997–2004M166 E16 R at 2,500 rpm1997–2005M166 E16 at 5,250 rpm at 4,000 rpmM166 E19 at 5,500 rpm at 4,000 rpm1999–2005M166 E21 at 5,500 rpm at 4,000 rpm2002–2004
M166 E14 1997–2004 W168 A140
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