The Mercedes Benz Ml320, particularly models from the 2007 and 2008 era, represents a compelling option in the used luxury SUV market. Owners often praise its robust build and diesel engine performance. Having personally experienced the 2008 ML320 CDI, which is mechanically akin to the 2007 model and avoids the AdBlue system introduced in later years, I can offer insights into what makes this vehicle a noteworthy choice, and what potential buyers should be aware of. My experience is based on a purchase from a local Mercedes Benz dealer, ensuring a history of maintenance and local ownership, verified through Carfax and dealer records. With 106,000 miles at purchase, and now at 113,000 miles, here’s a comprehensive look at the Mercedes Benz ML320.
The Alluring Aspects of the Mercedes Benz ML320
This SUV earns its nickname, “the beast,” for good reason. The Mercedes Benz ML320 exudes a sense of unwavering power, readily tackling diverse driving conditions. It stands out as an exceptional highway cruiser, especially the diesel variant which achieves fuel economy in the mid-20s MPG range. While gasoline models, requiring premium unleaded fuel, offer a still respectable mid to high teens MPG.
The interior of the Mercedes Benz ML320 showcases Mercedes’ commitment to quality, although subtle cost-saving measures are noticeable. A significant advantage of these pre-AdBlue models is the inclusion of a spare tire, albeit a compact one, due to the absence of the AdBlue tank. Passenger space is generous; the second row comfortably accommodates adults, even with taller front occupants. Legroom and headroom are ample, even for drivers and passengers over 6 feet tall.
Addressing the “Warts”: Potential Drawbacks of the ML320
While the Mercedes Benz ML320 boasts numerous positives, there are areas where it shows its age, particularly when compared to modern vehicles. The audio system, despite delivering impressive sound quality and bass, lacks contemporary Bluetooth and iPod integration finesse. While functional, it’s not as seamless as today’s systems, and A2DP support is absent, which is understandable considering the vehicle’s design era predates this technology’s widespread adoption. Similarly, the navigation system, while operational, feels dated and less intuitive compared to modern GPS units. Negotiating for an updated navigation DVD with the dealer can be a worthwhile consideration.
The power tailgate can exhibit temperamental behavior. Inconsistent operation, sometimes opening unprompted or requiring manual assistance, suggests potential weakening of the hydraulic system responsible for its function. This system, complexly engineered with a hydraulic pump located beneath the floorboard, might require attention in older models.
Tire considerations are also important. The original 19-inch tires are a premium expense, and replacement of TPMS sensors is often necessary during tire changes. Budgeting for quality tire replacements and potential sensor costs is advisable.
Maintenance, particularly at dealerships, can be costly. DIY oil changes are feasible, especially with a topsider, but adhering to Mercedes’ specific oil requirements is crucial. The Mercedes Benz ML320 diesel engine mandates “Mobil1 ESP Formula M 5W40,” and requires approximately 9 quarts per oil change. Following a 10,000-mile oil change interval and 20,000-mile fuel filter replacement schedule is recommended.
Transmission fluid maintenance is another critical aspect. Despite manufacturer recommendations suggesting a single fluid change at 40,000 miles for the life of the transmission, experience with Mercedes 722.6 and later transmissions suggests more frequent changes. Fluid changes every 50,000 miles after the initial service are prudent to ensure longevity. Using genuine Mercedes-Benz transmission fluid is mandatory, and the fluid level check procedure is complex, lacking a traditional dipstick.
System complexity is a significant leap from older diesel engines. The OM642 engine in the Mercedes Benz ML320 CDI is considerably more intricate than older IDI engines, demanding a higher degree of technical understanding for repairs. Fuel cleanliness is paramount for CDI engines; contaminants or water can severely damage the injectors. Therefore, choosing reputable fuel stations is essential, although the fuel filter does incorporate a water separator.
Conclusion: Is the Mercedes Benz ML320 a Good Used SUV Choice?
Despite these potential “warts,” a well-maintained Mercedes Benz ML320 with comprehensive service records remains a highly recommendable used SUV. Its blend of robust performance, luxurious features, and spaciousness makes it a compelling option. Prospective buyers should prioritize models with documented maintenance history and consider pre-purchase inspections to address potential age-related issues, particularly concerning the catalytic converter, power tailgate, and transmission maintenance. By understanding both the advantages and potential maintenance considerations, owning a Mercedes Benz ML320 can be a rewarding experience.
