Mercedes-Benz M278.910 4.7L V8 Biturbo Engine 132K Miles

Description

For sale is a genuine Mercedes-Benz M278.910 4.7L V8 Biturbo engine with 132,000 miles. This twin-turbocharged V8 was developed as the successor to the naturally aspirated M273 and combines strong torque, direct fuel injection, and compact twin-turbo technology.

With a displacement of 4,663 cc, the M278 uses an aluminum V8 architecture, DOHC valvetrain, variable valve timing, direct injection, and two turbochargers.

This used engine has been professionally inspected and tested for proper operation before sale, making it a suitable OEM replacement for a compatible Mercedes-Benz application.

Performance & Reliability

The M278 4.7L Biturbo V8 was engineered to provide the power of a larger naturally aspirated V8 while improving efficiency and low-end torque.

Key specifications include:

• 4.7L / 4,663 cc V8
• Twin-turbo / Biturbo configuration
• DOHC 32-valve design
• Direct gasoline injection
• Variable valve timing
• Aluminum engine block
• Aluminum cylinder heads
• Water-cooled design
• Approximately 402–449 hp, depending on application
• Approximately 443–516 lb-ft of torque, depending on configuration

The strong low-rpm torque and smooth power delivery make the M278 particularly well suited to Mercedes-Benz luxury sedans, coupes, roadsters, and SUVs.

Fits In

The M278 engine family was used in select:

• Mercedes-Benz S500 / S550
• Mercedes-Benz CL500 / CL550
• Mercedes-Benz CLS500 / CLS550
• Mercedes-Benz E500 / E550
• Mercedes-Benz SL500 / SL550
• Mercedes-Benz ML500 / ML550
• Mercedes-Benz GL450
• Mercedes-Benz GL500 / GL550
• Mercedes-Benz GLS500 / GLS550

Because Mercedes used multiple M278 variants and calibrations, verify the M278.910 engine code and VIN before purchase rather than relying on the M278 family designation alone.

Mileage

132,000 Miles
Approximately 212,400 km

Despite the higher mileage, a properly tested M278 can remain a viable replacement engine. Inspection of cylinder condition, timing components, turbochargers, oil leaks, and cooling components is particularly important on a higher-mileage unit.

Engine Includes

Depending on configuration, the engine assembly may include:

• M278.910 long block
• Twin turbochargers
• Intake manifold
• Fuel injection components
• Throttle body
• Engine wiring harness
• Sensors
• Starter
• Alternator
• Additional accessories where available

Warranty & Installation

Professional installation by an experienced Mercedes-Benz technician is recommended.

Before installation, inspect the timing system, turbocharger oil and coolant lines, cooling system, engine mounts, seals, spark plugs, filters, and related components. Fresh engine oil and coolant should be used during installation.