The Mercedes Benz Ml 320, particularly models from the 2007 and 2008 era, represents a compelling option in the used luxury SUV market. Owners often appreciate the robust build and comfortable ride these vehicles offer. This review delves into the ownership experience of a 2008 ML 320 CDI, providing insights into its strengths and weaknesses, especially for those considering purchasing a similar model.
Performance and Driving Experience: “The Beast” on the Highway
The ML 320 CDI, powered by the OM642 diesel engine, earns its nickname “the beast” with its impressive power delivery. It excels as a highway cruiser, effortlessly maintaining speed and offering a comfortable ride even on long journeys. Fuel economy is a notable positive, with diesel models achieving mid-20s MPG on the highway. While gasoline-powered ML 320 variants require premium unleaded fuel and deliver mid-to-high teens MPG, the diesel option presents a more economical choice for frequent drivers.
Interior and Features: Comfort Meets Cost-Cutting
Inside, the Mercedes Benz ML 320 boasts a well-assembled interior. However, signs of cost reduction measures are noticeable, a common trend in the automotive industry during that period. Despite this, passenger space remains generous, particularly in the second row, accommodating adults comfortably even with taller front occupants. Headroom is ample, even for individuals over 6 feet tall.
While the audio system delivers impressive sound quality, including substantial bass, the Bluetooth and iPod integration are dated compared to modern standards. Functionality is present, but lacks the seamlessness of contemporary systems. Similarly, the navigation system, while functional, feels clunky and less intuitive than current navigation technologies. Prospective buyers might consider negotiating for a navigation DVD update with the dealer to improve this aspect.
Maintenance and Reliability: The Real Costs of Ownership
Maintenance is a critical aspect of ML 320 ownership. One reported issue involved a plugged catalytic converter, a potentially costly repair that the previous owner may have avoided by trading in the vehicle. For models approaching or exceeding 100,000 miles, checking the catalytic converter’s replacement history is advisable.
Tire replacement can be another significant expense. The original 19-inch tires are costly, and replacing the Tire Pressure Monitoring System (TPMS) sensors during tire changes is often necessary. DIY oil changes are feasible, especially with a topsider, but require specific Mobil 1 ESP Formula M 5W40 oil, and a substantial quantity of 9 quarts. The recommended oil change interval is every 10,000 miles, with fuel filter replacements every 20,000 miles.
Transmission fluid maintenance is crucial for longevity. Despite manufacturer recommendations suggesting a single fluid change at 40,000 miles for “lifetime” use, more frequent changes, around every 50,000 miles after the initial one, are highly recommended. This service requires a specific Mercedes Benz transmission fluid and is a complex procedure without a dipstick for fluid level checking.
The OM642 engine, while powerful and relatively modern, is significantly more complex than older diesel engines. Fuel system cleanliness is paramount due to the CDI injection system’s sensitivity to contaminants. Using high-quality fuel from reputable sources and adhering to fuel filter replacement intervals is essential to prevent injector issues.
Potential Issues and Things to Watch Out For
Beyond the catalytic converter and general maintenance, potential buyers should be aware of a few other points. The power tailgate can become temperamental, exhibiting erratic operation. This system’s complexity, involving a hydraulic pump, could lead to expensive repairs. While the audio system sounds good, the outdated infotainment technology is a notable drawback for modern users.
Conclusion
The Mercedes Benz ML 320, particularly the 2007-2008 CDI models, offers a blend of luxury, capability, and diesel fuel economy in the used SUV market. While it boasts a powerful engine, comfortable ride, and spacious interior, potential owners must be prepared for potentially higher maintenance costs and be aware of common issues like catalytic converter problems, tire expenses, and the aging infotainment system. Purchasing a well-maintained ML 320 with a comprehensive service history is crucial for a positive ownership experience.
