Mercedes-Benz M166 engine

The Mercedes-Benz M166 is a range of inline-four engines that Mercedes-Benz produced from 1997 to 2005, before the M266 succeeded it from 2004. It is mounted transversely, with two valves per cylinder and multipoint injection, and it was designed for the W168 A-Class and its sandwich concept, in which the engine sits at a 59 degree angle just behind the front axle. That layout improves weight distribution and, in a head-on collision, lets the engine slide under the floorpan instead of into the cabin. Versions were the E14 in the A140, the E16 in the A160 and the Vito, the E19 in the A190, the Vito and the Vaneo, and the E21 in the A210.