The Mercedes-Benz R320, a luxury touring vehicle, offered a blend of comfort, space, and performance. Choosing the right year is crucial to ensuring a reliable and enjoyable ownership experience. This guide will delve into the best and worst years of the R320, providing the information you need to make an informed decision.

Model Year Key Strengths Potential Weaknesses
2007-2009 (Diesel) Excellent fuel economy, strong torque, generally more reliable engine Potential for diesel-specific issues (DPF, injectors), higher maintenance costs, potential for outdated technology
2007 Well-regarded for overall reliability, fewer reported issues compared to other years Potential for early model year quirks, technology may be dated compared to newer vehicles
2008-2009 Improved features and technology over earlier models, generally reliable Potential for air suspension issues, some reported electrical problems
2006 (Avoid) First model year, potential for teething problems, higher incidence of reported issues Known for various problems including transmission failures, oil leaks, electrical issues

Detailed Explanations

2007-2009 (Diesel): Excellent fuel economy, strong torque, generally more reliable engine

The diesel variant of the R320, particularly from 2007 to 2009, is often considered the most desirable. The diesel engine provides significantly better fuel economy than the gasoline counterparts while also delivering ample torque for effortless acceleration and towing. These years are also generally known for having fewer major issues compared to the initial 2006 model. However, potential buyers should be aware of potential diesel-specific maintenance requirements.

Potential for diesel-specific issues (DPF, injectors):

Diesel engines, including the one in the R320, have components like Diesel Particulate Filters (DPF) and fuel injectors that can require specialized maintenance. The DPF can become clogged over time, especially with short trips, requiring regeneration or replacement. Fuel injectors can also fail, leading to poor performance and potential engine damage.

Higher maintenance costs:

Due to the complexity of diesel engines and the specialized parts required, maintenance costs can be higher compared to gasoline engines. Be prepared for potentially higher bills for services such as oil changes, fuel filter replacements, and DPF maintenance.

Potential for outdated technology:

While the 2007-2009 R320 diesel models offer a good balance of reliability and fuel economy, their technology may be considered outdated compared to newer vehicles. Consider if features like advanced driver-assistance systems or a modern infotainment system are important to you.

2007: Well-regarded for overall reliability, fewer reported issues compared to other years

The 2007 model year is often cited as being one of the most reliable R320s. Owners have reported fewer major mechanical and electrical problems compared to the earlier 2006 model. This makes the 2007 a solid choice for those prioritizing reliability.

Potential for early model year quirks:

While generally reliable, the 2007 model might still have some minor quirks associated with being an early model year. These might include software glitches or minor component failures that were addressed in later years.

Technology may be dated compared to newer vehicles:

As with any vehicle of this age, the technology in the 2007 R320 will be less advanced than in newer cars. Consider if the available features meet your needs and expectations.

2008-2009: Improved features and technology over earlier models, generally reliable

The 2008 and 2009 model years saw further refinements and improvements to the R320. These models often include updated features and technology compared to the 2007 model, while still maintaining a good level of reliability.

Potential for air suspension issues:

The air suspension system, which provides a comfortable ride, can be prone to issues in these model years. Common problems include leaks in the air springs and failures of the air compressor. Repairs can be costly.

Some reported electrical problems:

While generally reliable, some owners have reported electrical problems with the 2008 and 2009 R320 models. These can range from minor issues like malfunctioning sensors to more serious problems affecting the vehicle's electrical system.

2006 (Avoid): First model year, potential for teething problems, higher incidence of reported issues

The 2006 model year, being the first year of production for the R320, is generally considered the least desirable. First-year models often have "teething problems" as manufacturers work out any design or manufacturing flaws.

Known for various problems including transmission failures, oil leaks, electrical issues:

The 2006 R320 has been known to suffer from a variety of issues, including transmission failures, oil leaks, and electrical problems. These issues can be costly to repair and can significantly impact the ownership experience.

Potential for teething problems:

As the first model year, the 2006 R320 suffered from various initial production issues that were addressed in later years. This makes it generally less reliable than subsequent model years.

Higher incidence of reported issues:

Compared to later model years, the 2006 R320 has a higher incidence of reported problems across various systems, making it a less desirable choice for those seeking reliability.

Frequently Asked Questions

Which R320 model year is the most reliable? The 2007 R320 is generally considered the most reliable, with fewer reported issues compared to other model years. However, the diesel models from 2007-2009 are also very reliable.

Are the diesel R320s worth the extra maintenance? If fuel economy and torque are important to you, the diesel R320s are a good choice. Be prepared for potentially higher maintenance costs associated with diesel engines.

What are the most common problems with the R320? Common problems include air suspension issues, electrical problems, and, in the 2006 model, transmission failures and oil leaks. Diesel models can have issues with the DPF and fuel injectors.

Is the air suspension system reliable? The air suspension system can be prone to issues, particularly in the 2008 and 2009 models. Repairs can be costly, so it's important to have the system inspected before purchasing a used R320.

Should I avoid the 2006 R320? Due to its higher incidence of reported problems, the 2006 R320 is generally best avoided unless you are comfortable with the potential for repairs.

Conclusion

Choosing the right year for your Mercedes-Benz R320 can significantly impact your ownership experience. While the 2006 model should generally be avoided due to its initial production issues, the 2007-2009 diesel models and the 2007 gasoline model offer a better balance of reliability and features. Always have a pre-purchase inspection performed by a qualified mechanic to identify any potential issues before making a decision.