MERCEDES Engine 300-85257 Benz 221 1295526

( Manufacturer Part Number: S550 ), ( Part Type: Engine ), ( Conditions Options: 5.5l ), ( Genuine Oem: Yes ), ( Ipn: 300-85257 ), ( Make: Mercedes-benz )

Review MERCEDES benz Engine 221 Type Fits S class fits S550 AWD 2010–2011

The Mercedes-Benz 3.0-liter V6 biturbo engine, model number 221, is a masterpiece of modern automotive engineering, expertly crafted for the Mercedes-Benz S550 AWD 10-11 S-Class. This powerhouse engine is part of the third generation of Mercedes-Benz's V6 turbocharged family, boasting impressive performance, efficiency, and refinement.

Measuring 3.0 liters, the engine delivers a maximum power output of 329 horsepower at 5,500 rpm, while producing a peak torque of 354 lb-ft at 1,400-4,500 rpm. The biturbocharging system consists of two turbochargers, each with its own exhaust gas recirculation system, ensuring optimal engine response and performance across the entire rev range.

The engine features advanced technologies such as spray-guided direct injection, which delivers fuel directly into the combustion chamber for improved efficiency and reduced emissions. The engine also benefits from Mercedes-Benz's BlueTEC technology, which reduces nitrogen oxide emissions through the use of a selective catalytic reduction system and AdBlue injection.

The Mercedes-Benz 3.0-liter V6 biturbo engine is mated to a 7G-Tronic Plus automatic transmission, which offers seven forward gears for smooth, effortless shifting. This transmission employs a wide ratio spread, enabling excellent acceleration and fuel efficiency. The engine's all-wheel-drive system provides enhanced traction and stability, making it an ideal choice for the S550 AWD S-Class.

Designed for durability and longevity, the engine block is made of compacted graphite iron, a material known for its superior strength and heat resistance. The engine's cylinder liners are made of a wear-resistant aluminum alloy. The use of these materials ensures the engine can withstand the rigors of daily driving while maintaining excellent performance and efficiency.

The Mercedes-Benz 3.0-liter V6 biturbo engine is not only powerful and efficient but also remarkably quiet and refined. Its advanced sound insulation and engine mounting systems help to minimize vibration and reduce interior cabin noise, ensuring a serene and luxurious driving experience.

In summary, the Mercedes-Benz 3.0-liter V6 biturbo engine, model number 221, is a sophisticated, high-performance powertrain that seamlessly integrates into the S550 AWD 10-11 S-Class. With its impressive power output, advanced technologies, and refined demeanor, this engine delivers an unforgettable driving experience that is synonymous with the Mercedes-Benz brand.

Buying a Mercedes-Benz 300-85257 engine for a 10-11 S-Class S550 AWD model can be a significant investment. Here are some potential pros and cons to consider before making a decision.

1. High Performance: The 300-85257 engine is a powerful unit, delivering impressive acceleration and smooth power delivery. It is a V8 engine that produces around 449 horsepower and 516 lb-ft of torque, making it a popular choice among Mercedes-Benz enthusiasts.

2. Advanced Technology: This engine comes with advanced technology features such as direct fuel injection, variable valve timing, and an advanced engine management system. These features help to improve performance, fuel efficiency, and reduce emissions.

3. Reliability: Mercedes-Benz engines are known for their reliability, and the 300-85257 engine is no exception. It has undergone extensive testing and development to ensure that it meets the high standards set by the brand.

4. Luxury and Comfort: The S-Class is known for its luxury and comfort features. The engine upgrade will add to the overall driving experience, making it a more enjoyable car to drive.

1. Cost: The cost of buying and installing a new engine can be quite high. The price of the 300-85257 engine itself can range from $15,000 to $20,000, and the cost of installation can add another $5,000 to $10,000.

2. Complexity: The engine is a complex piece of machinery, and installing it requires specialized knowledge and tools. It is recommended that the installation be done by a certified Mercedes-Benz mechanic to ensure that it is done correctly.

3. Maintenance: The 300-85257 engine requires regular maintenance to keep it in good working order. This includes oil changes, air filter replacements, and other routine maintenance tasks. The cost of maintenance can add up over time.

4. Fuel Efficiency: While the engine delivers impressive power, it can also be quite thirsty. The fuel efficiency of the S-Class with this engine is around 16 mpg in the city and 24 mpg on the highway.

The decision to buy and install a Mercedes-Benz 300-85257 engine in a 10-11 S-Class S550 AWD model depends on individual preferences and circumstances. If you value high performance, advanced technology, and luxury, then this engine upgrade may be worth the investment. However, if you are concerned about the cost, complexity, maintenance requirements, and fuel efficiency, then it may be worth considering other options. Ultimately, it is recommended that you consult with a trusted Mercedes-Benz mechanic or dealership to help you weigh the pros and cons and make an informed decision.

If you have decided that the 300-85257 engine upgrade is the right choice for you, then it is recommended that you only purchase the engine from a trusted Mercedes-Benz dealer or certified mechanic. This will ensure that you are getting a genuine, high-quality engine that is compatible with your vehicle. Additionally, it is important to have the installation done by a certified Mercedes-Benz mechanic to ensure that it is done correctly and efficiently. Finally, be sure to factor in the ongoing maintenance costs when considering the overall cost of the engine upgrade.

Details:

part #: s550 prices

• $1249.90-$1525.41

specifications grokengines:

• for models: S550, Awd
• for makes: Mercedes
• for years: 2010-2011
• mpn: S550
• part type: Engine
• conditions options: 5.5l
• genuine oem: Yes
• ipn: 300-85257
• make: Mercedes-benz

seller grokengines:

• # reviews: 132
• rating: 100.0%
• city: Laurel,

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• class: Freight
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• type: Fixed
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returns grokengines:

• time: 60 Days
• policy: Returns Accepted
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general grokengines:

• condition: Used
• Car Truck Parts Accessories > Engines Engine Parts > Engines

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offer grokengines:

• options: Ship-to-home
• quantity: 1
• started: March 18, 2026
• best offers: True
• sold: 0
• availability: In Stock

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