The Best Years For Mercedes Benz S320 And Some To Avoid

The Mercedes-Benz S320, a member of the prestigious S-Class family, represents a blend of luxury, comfort, and engineering prowess. For those seeking a refined driving experience without the exorbitant price tag of newer models, the S320 presents a compelling option. However, not all model years are created equal. This guide aims to navigate the complexities of the S320's production run, highlighting the best years to consider and those to potentially avoid, ensuring you make an informed decision.

S320 Model Years: A Quick Overview

The S320 nameplate has appeared in a few distinct eras of the S-Class lineage. Primarily, we'll be focusing on the W140 generation (1994-1999 in the US market) and the W220 generation (2000-2002 for the S320 CDI in some markets, though primarily a diesel variant). Understanding the nuances of each generation is key to finding the perfect S320 for your needs.

S320 Model Year Comparison Table

Detailed Explanations

W140 Generation (1994-1999): This generation is renowned for its solid construction and luxurious appointments. The S320, in particular, offered a balance of performance and fuel economy with its inline-six engine. The long wheelbase versions (SEL) provided even more rear passenger legroom. These cars are known for their smooth ride and comfortable interiors, making them excellent choices for long-distance cruising.

Robust build quality: The W140 was famously over-engineered, resulting in exceptional durability. The materials used were of high quality, contributing to a feeling of solidity and longevity.

Comfortable ride: The suspension system, designed for comfort, effectively absorbs road imperfections, providing a smooth and relaxed driving experience.

Iconic design: The W140's imposing presence and classic Mercedes-Benz styling have made it a timeless design. Its boxy shape and distinctive features are instantly recognizable.

Available in both short and long wheelbase: This allowed buyers to choose a model that best suited their needs, with the long wheelbase offering significantly more rear legroom.

Complex electronics: The W140 was packed with advanced electronics for its time, including features like automatic climate control, power seats, and a sophisticated sound system. However, these systems can be prone to failure as the car ages.

Potential for rust: Rust can be a concern, especially in areas with harsh winters and road salt. Common rust spots include the wheel arches, door bottoms, and around the windshield.

High maintenance costs: Due to the complexity of the car and the age of the components, maintenance costs can be higher than for more modern vehicles. Finding qualified mechanics familiar with the W140 is also crucial.

Early models prone to biodegradable wiring harness issues: Early W140 models (specifically from the early to mid-1990s, though usually rectified by the time the S320 came to market) suffered from a biodegradable wiring harness. The insulation would crumble and cause electrical shorts. By the time the S320 was available, most cars had this issue addressed, but it's worth checking for.

W220 Generation (S320 CDI - Diesel, select markets, 2000-2002): While not as widely available as the gasoline-powered S-Class models in North America, the S320 CDI (diesel) variant of the W220 generation offered improved fuel economy and a more modern design. This generation also boasted more advanced features, such as the Airmatic air suspension system. However, reliability issues, particularly with the air suspension, plagued these models.

More modern design: The W220 featured a sleeker, more aerodynamic design compared to the W140. This gave it a more contemporary appearance.

Improved fuel economy (diesel): The diesel engine provided significantly better fuel economy than the gasoline engines offered in the S-Class, making it a more practical choice for long-distance driving.

Advanced features for its time: The W220 included advanced features like the Airmatic air suspension, COMAND infotainment system, and Distronic adaptive cruise control.

Air suspension problems (Airmatic): The Airmatic air suspension system is known to be problematic, with issues ranging from leaks to complete system failure. Repairs can be expensive.

Potential for rust (early models): Early W220 models were also prone to rust, though improvements were made in later years.

Electronic gremlins: The W220, like the W140, was packed with electronics, and these systems can be susceptible to glitches and failures as the car ages.

Best Years to Consider (W140 S320):

• 1997-1999: These later model years of the W140 S320 generally benefit from improvements made throughout the production run. Any lingering wiring harness issues are likely to have been addressed, and some of the earlier rust concerns were mitigated.
• Well-maintained examples: Regardless of the year, a well-maintained S320 is always the best choice. Look for cars with complete service records and evidence of regular maintenance.

Years to Potentially Avoid (W140 S320):

• Early models (1994-1996): While not necessarily bad, these models are more likely to have experienced the biodegradable wiring harness issue and may show more signs of wear and tear due to their age. A thorough inspection is crucial.

Key Considerations Before Purchasing

• Maintenance Records: Scrutinize maintenance records. Regular servicing is crucial for these vehicles. Look for evidence of oil changes, transmission services, and any major repairs.
• Rust Inspection: Thoroughly inspect the car for rust, paying particular attention to the areas mentioned above.
• Electronic Systems Check: Test all electronic systems, including the climate control, power seats, windows, and sunroof.
• Pre-Purchase Inspection: Have a qualified mechanic familiar with Mercedes-Benz vehicles perform a pre-purchase inspection. This can help identify potential problems before you buy.
• Budget for Repairs: Be prepared to budget for repairs. Even well-maintained S320s will likely require some maintenance as they age.

Frequently Asked Questions

What is the most reliable year for the Mercedes-Benz S320?

The 1997-1999 model years of the W140 S320 are generally considered the most reliable due to improvements made throughout the production run.

What are the common problems with the Mercedes-Benz S320?

Common problems include rust, electrical issues, and, in the case of the W220 S320 CDI, air suspension problems.

How much does it cost to maintain a Mercedes-Benz S320?

Maintenance costs can vary depending on the condition of the car and the type of repairs needed, but expect to spend more than you would on a more modern or less complex vehicle.

Is the Mercedes-Benz S320 a good car?

Yes, the S320 can be a good car, offering a luxurious and comfortable driving experience. However, it's essential to choose a well-maintained example and be prepared for potential maintenance costs.

What engine does the W140 S320 have?

The W140 S320 typically features a 3.2-liter inline-six engine, known for its smooth power delivery.

Is the W220 S320 CDI available in the US?

The W220 S320 CDI (diesel) was primarily available in European and other international markets, and was not commonly sold in the United States.

Conclusion

The Mercedes-Benz S320, particularly the W140 generation, offers a unique blend of classic luxury and robust engineering. By focusing on later model years (1997-1999 for the W140) and prioritizing well-maintained examples, you can find an S320 that provides a rewarding and comfortable driving experience. However, be prepared for potential maintenance costs and always conduct a thorough inspection before making a purchase.