Ultimate Guide To The Mercedes M273 Engine Specs

Picture a car engine that hums when you cruise but roars when you push it. That’s the Mercedes-Benz M273 engine. It gives you both power and peace on the road.

This engine shows why Mercedes-Benz cars feel smooth, fast, and full of life. The Mercedes M273 engine is a powerful V8 engine known for its smooth performance and strong reliability. Many people think all engines work the same way. They don’t. The Mercedes-Benz M273 stands out.

It blends strong power with smooth performance. You’ll find this engine in models like the S550, E550, and SL550. Mercedes built it to replace the older M113 engine. It shares its roots with the Mercedes-Benz M272, a smaller but related V6 engine.

The M273 uses a DOHC V8 setup. That means it has two cams on each cylinder head and breathes better. It runs on regular gas and still offers solid performance. This makes it both fun and reliable. Why does this engine matter? Because it gives you a luxury feel with every mile. It powers up quickly, shifts smoothly, and never feels rough. It’s a quiet performer with a wild side.

In this guide, we’ll explore the Mercedes-Benz M273 engine specs. We’ll also look at its best features, common problems, and how it compares to the Mercedes-Benz M272. Get ready to learn why drivers and mechanics still trust this V8 beast.

Mercedes-Benz introduced it in the mid-2000s as part of its advanced engine lineup. It uses sequential fuel injection, which delivers fuel precisely to each cylinder for better efficiency and power. Unlike the M272 V6, which shares some design elements, the M273 offers more torque and a stronger performance feel, especially in larger models like the S-Class and E-Class.

This engine features a lightweight aluminum block, dual overhead camshafts (DOHC), and four valves per cylinder. These components help the engine breathe better and respond faster. It delivers both quiet cruising and powerful acceleration, making it ideal for luxury sedans and coupes. The M273 is not just about speed—it’s engineered for long-term dependability and refined driving.

M273 Engine Variants And Models

The Mercedes-Benz M273 engine came in two main variants and powered a wide range of Mercedes-Benz vehicles during the 2000s. Built with an aluminum engine block, this V8 engine was designed for high performance, reduced weight, and better heat dissipation.

Mercedes used it in luxury sedans, coupes, and SUVs, offering drivers a blend of smooth acceleration, strong mid-range power, and long-term reliability. Both variants of the M273 featured sequential fuel injection, DOHC (dual overhead camshafts), and variable valve timing, including a finely tuned intake camshaft for improved efficiency and throttle response.

These technical upgrades helped the engine deliver quiet, refined power with minimal vibrations, perfect for high-end driving experiences. The M273 powered flagship models like the S-Class, E-Class, CL-Class, GL-Class, and SL-Class prove their versatility across both road cruisers and powerful utility vehicles.

Here’s a quick breakdown of the key M273 engine versions:

These engines played a major role in defining Mercedes-Benz performance during the late 2000s, offering a driving experience that was both powerful and refined.

What Variants Are Available For The M273?

This engine delivers up to 383 horsepower at 6000 rpm, making it capable of strong, responsive acceleration. It also produces impressive torque, offering smooth low-end pull and consistent highway power. Whether cruising or accelerating, the M273 runs quietly but confidently—its refined hum reflects the precision engineering behind its design.

What Is The Power Output Of The Mercedes M273 Engine?

The Mercedes M273 engine delivers an impressive 345 to 383 horsepower. Its power ensures both speed and smoothness on the road. This blend of power and performance makes it a favorite for many drivers who love a thrilling ride.

A well-built engine such as the M273 is not only about speed. It also ensures durability and efficiency. This makes long drives enjoyable and fuel consumption manageable.

Imagine driving down the open highway with power at your fingertips, but without excessive fuel concerns. It’s a smart design wrapped in luxury. This engine has been favored by many for its seamless balance of power and poise. For those who love to drive fast but enjoy a quiet engine, it’s perfect.

Common Issues And How To Address Them

While the Mercedes M273 engine is generally reliable, it’s not without its flaws. Many owners, especially those driving older models with the 4.7L variant, have reported issues over time. Common problems include timing chain wear, oil leaks, and intake manifold faults.

These issues often arise due to age, high mileage, or neglected maintenance. The engine’s cylinder bore and valve components are finely tuned, so even small issues can lead to larger problems if ignored. Since the M273 was designed by Daimler AG for premium performance, it needs consistent upkeep to stay in top shape.

Key Maintenance Tips:

• Change engine oil and filter regularly to prevent sludge and leaks
• Watch for timing chain noise—rattling on startup may signal wear
• Inspect valve cover gaskets and front cover for oil seepage
• Use only OEM or approved parts for repairs

Routine service and attentive care can significantly extend the M273’s lifespan. Many issues begin with small warning signs—strange noises, minor oil spots, or check engine lights. Addressing these early keeps repair costs low and engine performance high.

Do Mercedes Engines Last Long?

Yes, Mercedes-Benz engines are built to last. With proper care, many easily exceed 200,000 miles. Regular oil changes, fluid checks, and prompt repairs help keep the engine running strong for years. Even high-performance units like the M273 and the similar M272 V6 can maintain peak condition well past their warranty period.

Is The M273 Engine Reliable?

Absolutely. The M273 engine is praised for its solid build and smooth performance. It produces up to 250 kW (about 335–382 hp, depending on the variant), offering a balanced mix of power and comfort.

While it’s reliable, some drivers have reported issues like a check engine light triggered by intake or timing components. These are usually manageable with early detection and routine maintenance. If you service your Mercedes on schedule and respond quickly to warning signs, your engine will reward you with years of dependable driving.

Comparison With Other Mercedes Engines

In the realm of Mercedes engines, the M273 holds its ground with charm and strength. Unlike the M272, it boasts better power and enhanced efficiency, traits that make it a preferred choice for luxury cruisers.

A fun fact? It’s less prone to balance shaft issues, giving it an edge in the longevity department. Unlike some new kids on the block, it delivers a classic smoothness. But as they say, newer isn’t always better! Let’s peek at the specs:

Feature	M273	M272
Power	Higher	Moderate
Efficiency	Improved	Good
Reliability	More Reliable	Some Issues

Compared to later models, the M273 maintains a balance between innovation and classic Mercedes reliability. Most newer models focus on advanced tech, but the M273 is loved for its straightforward mechanics that say, “Why fix what’s not broken?” Overall, it’s a mix of old-school luxury charm with new-age engineering. Now, who wouldn’t want to ride with a friend who brings the best of both worlds?

What Is The M272 engine?

The Mercedes-Benz M272 engine is a V6 gasoline engine used in various Mercedes-Benz vehicles, primarily in the mid-2000s. It is known for its balance of performance and fuel efficiency. The M272 features a DOHC (dual overhead camshaft) design with cylinder liners to improve durability and engine lifespan.

This engine is engineered to offer smooth power delivery and better fuel economy compared to larger V8 engines like the M273. In this engine, the right cylinder bank and left cylinder bank work together to provide consistent performance across different driving conditions.

The M272 was commonly found in vehicles such as the E-Class, C-Class, and S-Class, delivering a refined driving experience with decent power output and lower fuel consumption for its class. It’s widely regarded for its reliability and efficient performance.

Performance Upgrades And Modifications

Imagine turning your car into a speed demon! Performance upgrades for the Mercedes M273 engine can do just that. Enthusiasts often choose to tweak this engine with turbochargers, high-flow exhausts, or performance chips. It’s like giving the car a breath of fresh air—kaboom! Upgrades can boost power and make your heart race.

But here’s the twist: these cool modifications might affect the car’s health! Reliability and lifespan might take a hit. Think of it like growing muscles, but getting a bit tired faster. So, choose wisely and maybe consult a mechanic. Remember, a speedy turtle can still be a happy turtle!

Upgrade Option	Pros	Cons
Turbocharger	More power	More heat
Performance Chip	Speed boost	Possible engine wear
High-flow Exhaust	Better airflow	Noise increase

History And Development Of The M273 Engine

The M273 engine represents a major improvement over the M113 engine. The M113 was powerful but lacked the efficiency that the M273 brings. The M273 introduced variable valve timing, allowing it to adjust better to driving conditions. This change improved the engine’s torque output and fuel efficiency.

The M273 also has a cylinder bore of 929 mm, a size that helps balance performance and fuel economy. This engine offers more power and a smoother ride compared to its predecessor. It brings a better driving experience in Mercedes-Benz vehicles, combining strength with smarter tech.

Here’s a quick look at the evolution:

The M273 has advanced the engineering of Mercedes-Benz vehicles. It blends traditional V8 power with modern, fuel-efficient technologies. This engine paved the way for more refined and powerful vehicles, making it a key component in the brand’s history.

User Reviews And Experiences

Many Mercedes owners and enthusiasts highly regard the M273 engine for its smooth operation and reliable performance. It’s especially praised for its balance of power and comfort. The engine provides strong acceleration while maintaining a quiet and refined ride, making it a popular choice among luxury car drivers.

Owners highlight that the M273 excels in both short trips and long highway drives. Most importantly, many users report that the engine performs well over time, with proper care.

However, the M273 does require proper maintenance to keep it running smoothly. Regular oil changes, checking the exhaust manifold, and staying on top of repairs are essential to its longevity. Neglecting these tasks can result in costly repairs, which is why many owners recommend sticking to a strict maintenance schedule, especially for expensive models.

Long-Term Reliability

The M273 engine is known for its durability and long-term reliability. With proper maintenance, it can easily surpass 200,000 miles, offering excellent performance even as it ages.

Driving Experience

Owners often describe the driving experience as both powerful and refined. The engine provides a smooth, quiet ride while still offering the performance expected from a Mercedes-Benz. It handles well in various driving conditions, from city traffic to open highways.

Maintenance Considerations

Regular maintenance is crucial for the M273 engine’s continued performance. Monitoring parts like the exhaust manifold, air filters, and oil levels can help prevent common issues and reduce the risk of expensive repairs. Regular service checks will keep the engine running at its best and extend its lifespan.

Is The M273 Engine Reliable For Long Trips?

Yes, the M273 engine is reliable for long trips. Many owners trust it for extended journeys, noting its strong build and smooth performance over long distances. With proper maintenance, it consistently delivers power and efficiency on highways and local roads, ensuring a comfortable and dependable ride throughout the trip.

Conclusion

The Mercedes M273 engine is powerful and reliable. It’s known for smooth performance and robust design. When well-maintained, it can last long and enhance your driving experience. For more info, check user forums or official manuals. Keep learning and caring for your engine to enjoy many safe and exciting miles on the road.

FAQs

1.What Are The Common Issues And Known Reliability Problems Associated With The Mercedes M2 Engine?

The Mercedes M2 engine can have some problems. Sometimes, it might have oil leaks, which means the oil drips out. It can also have trouble with the cooling system, making the engine too hot. Sometimes, the parts inside can wear out faster than expected. Keeping the engine in good shape with regular check-ups can help it last longer.

2.How Does The Mercedes M2 Engine Compare To Its Predecessor, The M11in Terms Of Performance And Engineering Advancements?

The Mercedes M2 engine is like a faster and smarter version of the old M1 engine. It uses less fuel, which means you save more. The M2 engine also makes the car go vroom faster and smoother. It is better at being kind to nature by not letting out too much bad stuff. So, the M2 engine is more fun and friendly for everyone.

3.What Maintenance Practices Are Recommended To Ensure The Longevity And Optimal Performance Of The Mercedes M2 Engine?

To keep a Mercedes M2 engine running well, check the oil often. Change it when it’s dirty. Make sure to replace air filters when they look dusty. Keep the engine clean and look for any leaks. Follow the instructions in the car manual.

4.Can The Mercedes M2engine Be Upgraded Or Tuned For Better Performance, And If So, What Aftermarket Modifications Are Commonly Pursued?

Yes, you can make the Mercedes M2 engine better. We can add a stronger exhaust to help it breathe more easily. Sometimes, people upgrade the air filters to get more air in. Changing the car’s computer chip can also make it faster. These changes help the car perform better.

5.Which Mercedes-Benz Models Were Equipped With The M2 Engine, And During Which Production Years Was It Utilized?

The M272 engine was used in some Mercedes-Benz cars. It was in models like the C-Class, E-Class, and S-Class from 2004 to 2015. This engine helped the cars go fast and run smoothly. So, if you saw these models from those years, they might have had the M272 engine!