The Mercedes-Benz E550, representing a luxurious and powerful iteration of the iconic E-Class, offers a compelling blend of performance and comfort. However, not all model years are created equal. This guide aims to navigate prospective buyers through the E550's history, highlighting the best years to consider and those that might present more challenges.
Mercedes-Benz E550: Model Years Overview
| Model Year | Key Features/Engine | Potential Issues/Considerations |
|---|---|---|
| 2007-2009 (W211) | 5.5L V8 (382 hp), 7-speed automatic | Air suspension issues, potential for oil leaks, SBC brake system (2007) |
| 2010-2011 (W212) | 5.5L V8 (382 hp), 7-speed automatic | Balance shaft issues (early production 2010), COMAND system complexity |
| 2012-2017 (W212) | 4.6L Twin-Turbo V8 (402 hp), 7-speed automatic | Turbocharger issues (rare but costly), potential for electronic glitches, oil leaks |
Detailed Explanations
2007-2009 (W211): The Pre-Facelift Powerhouse
The 2007-2009 E550 models, part of the W211 generation, are powered by a naturally aspirated 5.5-liter V8 engine producing 382 horsepower. This engine offers strong performance and a classic V8 sound. The 7-speed automatic transmission provides smooth and responsive shifts. However, these models are known for potential air suspension problems, which can be expensive to repair. Oil leaks, common in older Mercedes-Benz vehicles, should also be inspected. The 2007 model year also features the Sensotronic Brake Control (SBC) system, which, while innovative, can be costly to maintain or replace.
Air Suspension Issues (2007-2009): The air suspension system, designed for a smooth and comfortable ride, is prone to leaks and compressor failures. Symptoms include the car sitting unevenly or failing to raise/lower. Repair costs can be significant, often requiring replacement of air struts and/or the compressor. Thorough inspection and maintenance records are crucial.
Potential for Oil Leaks (2007-2017): Oil leaks are a common issue in older Mercedes-Benz engines. Typical leak locations include valve cover gaskets, oil cooler lines, and the rear main seal. Regular oil changes and inspections can help identify and address leaks early, preventing more serious problems.
SBC Brake System (2007): The Sensotronic Brake Control (SBC) system is an electro-hydraulic braking system that provides enhanced braking performance. However, it requires specialized maintenance and can be costly to repair or replace due to its complexity and proprietary components. The SBC pump has a limited lifespan and will eventually need replacement. Many owners prefer to avoid vehicles equipped with SBC due to these potential costs.
2010-2011 (W212): The Transition Years
The 2010-2011 E550 models represent the beginning of the W212 generation. They retain the 5.5-liter V8 engine but feature a more modern design and updated technology. The interior is significantly improved compared to the W211 generation. However, some early production 2010 models have been reported to experience balance shaft issues, a potentially expensive repair. The COMAND system, while advanced for its time, can also be complex and require some getting used to.
Balance Shaft Issues (Early Production 2010): A small percentage of early production 2010 E550 models experienced premature wear on the balance shaft. This issue can lead to engine noise, reduced performance, and eventually engine failure. Checking the engine serial number and service history can help determine if a particular vehicle is affected. Repairing the balance shaft requires significant engine disassembly and is a costly undertaking.
COMAND System Complexity (2010-2017): The COMAND system, Mercedes-Benz's infotainment system, offers a range of features, including navigation, audio controls, and vehicle settings. However, it can be complex and difficult to navigate, especially for those unfamiliar with the system. Some users find the interface unintuitive and prefer aftermarket solutions.
2012-2017 (W212): The Twin-Turbo Era
The 2012-2017 E550 models received a significant upgrade with the introduction of a 4.6-liter twin-turbocharged V8 engine, producing 402 horsepower. This engine offers even more impressive performance and improved fuel economy compared to the naturally aspirated 5.5-liter V8. The twin-turbo engine provides a noticeable increase in torque and responsiveness. While generally reliable, these models can experience turbocharger issues, although this is relatively rare. Potential for electronic glitches and oil leaks should also be considered.
Turbocharger Issues (2012-2017): Although not common, the twin-turbochargers on the 4.6-liter V8 can experience failures. Symptoms include reduced power, whistling noises, and oil leaks. Turbocharger replacement can be expensive, so regular maintenance and proper driving habits are essential.
Potential for Electronic Glitches (2012-2017): Modern Mercedes-Benz vehicles are equipped with a complex network of electronic systems. These systems can sometimes experience glitches, leading to issues with features like the infotainment system, driver assistance systems, and climate control. Resetting the system or updating the software can often resolve these issues.
Oil Leaks (2012-2017): Similar to the earlier models, the 2012-2017 E550 can also experience oil leaks. Regular maintenance and inspections are crucial to identifying and addressing leaks early. Common leak locations include valve cover gaskets, oil cooler lines, and turbocharger oil lines.
Frequently Asked Questions
Which E550 model year is the most reliable?
The 2012-2017 models with the 4.6L twin-turbo V8 are generally considered the most reliable, thanks to the improved engine design and fewer widespread issues. However, proper maintenance is crucial for any model year.
Are E550s expensive to maintain?
Yes, E550s can be expensive to maintain due to the complexity of the vehicle and the cost of parts. Regular maintenance and addressing issues promptly can help mitigate costs.
What should I look for when buying a used E550?
Look for a well-maintained vehicle with a complete service history. Have a pre-purchase inspection performed by a qualified Mercedes-Benz mechanic to identify any potential issues.
Is the air suspension reliable on the E550?
The air suspension system on the 2007-2009 models is known to be problematic. Consider this factor when evaluating these model years.
How does the 4.6L twin-turbo V8 compare to the 5.5L V8?
The 4.6L twin-turbo V8 offers more horsepower and torque, resulting in improved performance and fuel economy compared to the naturally aspirated 5.5L V8. The 4.6L is also generally considered more reliable.
Conclusion
Choosing the best year for a Mercedes-Benz E550 depends on your individual priorities and budget. The 2012-2017 models with the 4.6L twin-turbo V8 generally offer the best balance of performance, reliability, and modern features. However, earlier models can be a good value if properly maintained and inspected, especially if you are comfortable addressing potential issues like air suspension problems or oil leaks. Remember to prioritize a thorough pre-purchase inspection and a complete service history to make an informed decision.