Mercedes-Benz M256 engine
The Mercedes-Benz M256 engine is a turbocharged straight-six engine produced since 2017, when it was first introduced on the W222 S450. It replaces the previous M276 V6 engine.Design
The M256 shares a modular design with other inline-four and V8 engines, which are all per cylinder. It uses an aluminium alloy block with dual overhead camshafts and has 4 valves per cylinder. The M256 uses a 48V electrical system to operate a BorgWarner electric auxiliary compressor, which can spin up to 70,000 rpm to reduce turbo lag. An integrated starter alternator also provides up to and of boost, and replaces the drive belts by managing the water pump and air conditioning; allowing for a smaller and lighter engine.Models
Engine output excluding the additional 48V system boost:
| Engine | Power | Torque | Years |
M256 E30
DEH LA GR |
at 5,500–6,100 rpm |
at 1,600–4,000 rpm | 2017– |
M256 E30
DEH LA G |
at 5,900–6,100 rpm |
at 1,800–5,500 rpm | 2017– |
M256 E30 DEH LA GR
