Mercedes-Benz M112 engine

The Mercedes-Benz M112 is a family of V6 petrol engines introduced in 1996, the first petrol V6 that Mercedes-Benz ever built. Its blocks are cast from silicon and aluminium (Alusil) with a 90 degree vee angle, and the aluminium single overhead camshaft heads have three valves per cylinder and two spark plugs per cylinder. A balancer shaft sits in the block between the cylinder banks to deal with the vibration of a 90 degree V6, and a dual-length variable intake manifold gives flexibility across the rev range. Capacities start at 2.4 litres and include supercharged versions assembled by AMG at Affalterbach, while the others were built at Bad Cannstatt. The related M113 V8 followed soon after, and the pair are often regarded as among the most reliable Mercedes-Benz engines of their era.