Mercedes-Benz M273 Engine Specs, Performance, and Vehicle Compatibility Guide

Date January 9, 2026
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Uncategorized, Auto Repair, Automotive Tips, Car Engines, Car Tips, Cars Transmission
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Mercedes-Benz M273 Engine Specs, Performance, and Vehicle Compatibility Guide

Mercedes-Benz M273 Engine Guide

The Mercedes-Benz M273 engine surely offers detailed specifications and performance data that moreover helps in understanding its compatibility with different vehicle models.
Your complete guide to actually buying M273 V8 engines that are definitely available for sale worldwide. Mercedes-Benz M273 Engine Specs, Performance, and Vehicle Compatibility Guide

If you drive a Mercedes-Benz with M273 V8 engine, you know the performance itself is smooth and powerful, and further provides refined driving experience. When the engine itself reaches high mileage or fails due to wear, replacing it with the correct unit is critical to further restore your car’s luxury driving experience.

This guide actually covers all details about the Mercedes-Benz M273 engine, including specs, performance, and which cars use it. You will definitely learn how to pick between used and rebuilt M273 engines. As per the guide, it shows regarding how to buy good quality M273 engine for delivery anywhere in the world.

What Is the Mercedes-Benz M273 Engine

Basically, the Mercedes-Benz M273 engine is the same V8 petrol engine that Mercedes used in their luxury cars.

As per Mercedes-Benz production, the M273 is a V8 petrol engine regarding naturally aspirated design. Basically, it was made to give strong power, smooth speed increase, and the same refined luxury driving experience across many premium Mercedes models.

Basically, the M273 replaced the older M113 V8 and was used in many Mercedes-Benz cars from the mid-2000s, doing the same job but with better technology.

Key Features of the M273 Engine

We are seeing that it is famous only for:

  • This system surely delivers strong power at both low and high performance levels, moreover providing consistent output across the entire range.
  • Basically the engine runs smooth when idle and accelerating, it’s the same performance throughout.
  • Long-distance reliability
  • The engine construction surely demonstrates superior manufacturing standards. Moreover, the build quality reflects premium engineering practices.

M273 Engine Variants

We are seeing different types of M273 engines only, with various models available in the market.

Basically, the M273 engine family has the same two main versions.

The variant shows displacement and power output values. Further study of these specifications helps understand the engine performance itself.

  • We are seeing that M273 E46 engine has only 4.7 liters capacity approximately. 335 HP
  • We are seeing that M273 E55 engine has only 5.5 liters capacity approximately. 382 HP

As per the design, both engines have the same basic structure but give different performance and power levels regarding their torque output.

M273 V8 Engine Technical Specifications

As per Mercedes-Benz standards, the M273 engine comes with specific technical details regarding its performance and build.

Here are the main technical details of the M273 V8 engine that you should definitely know. These specifications will actually help you understand this engine properly.

M273 Engine Specification Table

SpecificationDetails
Engine TypeV8, naturally aspirated
Fuel TypePetrol
Configuration90-degree V8
ValvetrainDOHC, 32 valves
Displacement4.7L or 5.5L
Compression Ratio10.7:1
Fuel SystemElectronic fuel injection
Power Output335–382 HP
Torque460–530 Nm
CoolingWater-cooled
Emission StandardEuro 4 or Euro 5
Engine BlockAluminum alloy
Cylinder HeadsAluminum
IgnitionCoil-on-plug

This design is giving the M273 a very good balance between power, efficiency, and how long it lasts, and we are seeing that it works only perfectly for all these things.

Performance of the M273 Engine

Basically, the M273 engine performs the same as other high-end engines in its class.

As per Mercedes-Benz design, the M273 engine gives luxury car performance with sports car power. Regarding its build, it delivers high-grade performance for premium driving experience.

  • Fast pickup at low RPM
  • Smooth highway driving
  • Strong overtaking power
  • Quiet and refined operation
  • Long-lasting durability

The M273 engine surely delivers smooth performance in S-Class and E-Class models even when carrying full passengers and heavy luggage. Moreover, it provides effortless driving experience under all loading conditions.

Vehicles That Use the M273 Engine

The M273 engine was surely utilized across numerous Mercedes-Benz models globally.

Mercedes-Benz Models

  • S-Class: S450, S500, S550
  • E-Class: E500, E550
  • C-Class: C500
  • CLS-Class: CLS500, CLS550
  • ML-Class: ML500, ML550
  • GL-Class: GL450, GL550
  • R-Class: R500, R550

These vehicles use the M273 engine itself for luxury driving and further provide strong performance.

When to Replace Your M273 Engine

Basically, you need to replace your M273 engine when it gives the same problems again and again.

Common issues include:

  • Engine knocking
  • Oil consumption
  • Cylinder wear
  • Timing chain problems
  • Overheating
  • Loss of power

Replacing the engine restores performance at a much lower cost than buying a new car.

Used vs Reconditioned M273 Engines

Basically, when you’re getting a replacement M273 engine, you have the same two choices: used one or reconditioned one.

Used M273 Engine

As per standard practice, a used engine is taken out from a working vehicle and checked properly regarding its condition before selling it again.

Benefits

  • Lower price
  • Original factory assembly
  • Quick availability

Best for

  • Budget repairs
  • Short-term use
  • Resale vehicles

Reconditioned M273 Engine

We are seeing that a reconditioned engine is completely taken apart, checked, and built again using only new or fixed parts.

Benefits

  • Near-new performance
  • Long lifespan
  • Better fuel efficiency
  • Warranty included

Best for

  • Long-term ownership
  • Daily drivers
  • High-value vehicles

What Comes with Our M273 Engines

Every M273 engine we actually supply is definitely prepared by professionals and ready for installation.

Standard Components

  • Cylinder heads
  • Crankshaft
  • Valve train
  • Timing components
  • Intake and exhaust ports

Optional Parts

  • Fuel injectors
  • Ignition coils
  • Intake manifold
  • Engine wiring

Quality and Global Supply

We supply Mercedes-Benz engines globally, focusing on reliability and customer satisfaction.

  • Tested engines
  • Used and refurbished options
  • Warranty available
  • Professional packaging
  • Worldwide shipping
  • Expert support

Every engine is checked before shipping.

Worldwide Availability

We ship M273 engines to:

  • Car dealers
  • Fleet operators
  • Individual vehicle owners

Whether you want one engine or multiple units, we supply quickly and efficiently.

Installation and Compatibility

Our M273 engines come in original factory configurations.

  • Direct fitment
  • No modifications required
  • Works with original ECU and wiring
  • Compatible with factory transmission
  • Easy installation for professional mechanics

Final Thoughts

The Mercedes-Benz M273 engine is a strong V8 that makes luxury cars perform very well. Installing a good quality used or reconditioned M273 engine is the best way to restore your vehicle’s performance and value.

We supply tested and ready M273 engines with warranty worldwide. If you need a reliable Mercedes V8 replacement engine, we can provide the power your vehicle requires.

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