Engine for Mercedes-Benz E35, E47, E55 (M273 4.7L / 5.5L)

M273 4.7L / 5.5L Engine for Mercedes-Benz E30, E35, E47, E55

The Mercedes-Benz M273 is a naturally aspirated, 90-degree V8 gasoline engine produced from 2005 to 2013. Featuring an all-aluminum construction, dual overhead camshafts, and continuously variable valve timing technology, the engine was primarily offered in 4.7-liter and 5.5-liter displacement variants, delivering smooth and ample power output for a wide range of luxury vehicles, SUVs, and high-performance models.

Description

Basic Specifications
Layout: Naturally Aspirated V8
Valve Mechanism: DOHC, 4 valves per cylinder, Continuous WVT
Block Material: Aluminum alloy with cast-in Silitec (silicon/aluminum alloy) cylinder liners
Cylinder Head Material: Aluminum alloy
Fuel System: Sequential Port Injection
Compression Ratio: 10.7:1

Displacement-Specific Variants
1. M273 E46 (4.7L)
Displacement: 4,663 cm³
Bore × Stroke: 92.9 mm × 86.0 mm
Power Output: 250 kW (335 hp) 6,000 rpm
Torque Output: 460 N·m (339 lb·ft) 2,700 – 5,000 rpm
Common Applications: GL450, ML450, S450w

2. M273 E55 (5.5L)
Displacement: 5,461 cm³
Bore × Stroke: 98.0 mm × 90.5 mm
Power Output: 285 kW (382 hp) 6,000 rpm
Torque Output: 530 N·m (391 lb·ft) 2,800–4,800 rpm
Common Applications: E550, S550, CL550, GL550, ML550