| Mercedes-Benz M166 | |
| Manufacturer: | Mercedes-Benz |
| Production: | 1997 – 2005 |
| Successor: | Mercedes-Benz M266 engine |
| Configuration: | Inline-four engine |
| Block: | Aluminium alloy |
| Head: | Aluminium alloy |
| Valvetrain: | SOHC 2 valves x cyl. |
| Fuelsystem: | Multipoint injection |
| Fueltype: | Gasoline |
| Coolingsystem: | Water cooled |
| Power: | NaN0NaN0 |
| Torque: | NaN0NaN0 |
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.
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]
| Engine | Displacement | Power | Torque | Years | |
|---|---|---|---|---|---|
| M166 E14 | 1397cc | 600NaN0 at 5,000 rpm | 1300NaN0 at 3,750 rpm | 1997–2004 | |
| M166 E16 R | 1598cc | 1400NaN0 at 2,500 rpm | 1997–2005 | ||
| M166 E16 | 750NaN0 at 5,250 rpm | 1500NaN0 at 4,000 rpm | |||
| M166 E19 | 1898cc | 920NaN0 at 5,500 rpm | 1800NaN0 at 4,000 rpm | 1999–2005 | |
| M166 E21 | 2084cc | 1030NaN0 at 5,500 rpm | 2050NaN0 at 4,000 rpm | 2002–2004 |