The Mercedes Benz Ml 320, particularly the models produced in the mid to late 2000s, represents a compelling option for those seeking a blend of luxury, performance, and practicality in a used SUV. Having experience with a 2008 ML320 CDI, which is fundamentally the same as the 2007 model and crucially, avoids the AdBlue system introduced in later years (2009 onwards for ML320s), I can offer some insights into the ownership experience. My vehicle, acquired from a local Mercedes Benz dealer, boasted a meticulously documented service history, primarily at the dealership. This local provenance, confirmed by Carfax and previous owner information, gave added confidence in the purchase. With 106,000 miles at acquisition, and now nearing 113,000 miles, my experience provides a relevant perspective for potential buyers considering a Mercedes Benz ML 320 in this mileage range.
The Allure of the Mercedes Benz ML 320: Performance and Practicality
One of the most immediately striking aspects of the Mercedes Benz ML 320, especially the CDI diesel variant, is its robust performance. The engine delivers a feeling of immense power, capable of tackling diverse driving conditions with ease. This is why we affectionately nicknamed ours “the beast.” It excels as a long-distance cruiser, offering commendable fuel economy for its class. Diesel models like the ML320 CDI can achieve mid-20s MPG on highway journeys. While gasoline-powered Mercedes Benz ML 320 models require premium unleaded fuel, and naturally exhibit slightly lower fuel economy in the mid to high teens MPG range, the overall driving experience remains refined and powerful.
The interior of the Mercedes Benz ML 320 reflects Mercedes’ commitment to quality, though some cost-saving measures are evident compared to earlier generations. Despite this, the cabin is well-assembled and comfortable. A significant advantage of the pre-AdBlue diesel models is the inclusion of a spare tire, albeit a compact one, in place of the AdBlue tank. Passenger space is generous, particularly in the second row, comfortably accommodating adults even with taller front occupants. As someone who is 6’3″, I find both headroom and legroom ample even with the driver’s seat positioned almost fully back.
Addressing the “Warts”: Common Issues and Considerations for the ML 320
While the Mercedes Benz ML 320 offers numerous positives, there are certain aspects that potential buyers should be aware of, which can be considered as “warts.” The audio system, while boasting impressive sound quality and bass, demonstrates its age in terms of modern integration. Bluetooth and iPod connectivity are functional but lack the seamlessness of contemporary systems. A2DP support, common in modern Bluetooth devices, was not available when these vehicles were designed in the mid-2000s. Similarly, the navigation system, while operational, feels outdated and less intuitive compared to modern GPS units. Negotiating for an updated navigation DVD with the dealer during purchase is advisable, as these can be costly to acquire separately.
The power tailgate can be another area of concern in older Mercedes Benz ML 320 models. Its operation can become erratic, sometimes opening without issue and at other times requiring assistance. This behavior suggests potential weakening of the hydraulic system, which is a complex mechanism involving a pump located under the floor and a cylinder in the roof.
Tire and related maintenance can also present notable expenses. The factory-specified 19-inch tires are premium priced. Furthermore, replacement of the Tire Pressure Monitoring System (TPMS) sensors is often necessary when changing tires. My own tire replacement experience involved a significant outlay for Continental tires and additional costs for TPMS sensors purchased online.
Maintenance, particularly when performed at dealerships, can be expensive. DIY oil changes are feasible, especially with a topsider oil extractor, but strict adherence to Mercedes Benz specifications is crucial. Specifically, only “Mobil 1 ESP Formula M 5W40” oil should be used, and the engine requires approximately 9 quarts per oil change. With recommended oil changes every 10,000 miles and fuel filter replacements every 20,000 miles, these costs can accumulate.
Transmission fluid maintenance is another area requiring careful attention. While the manufacturer’s manual initially specified a single transmission fluid change at 40,000 miles as “lifetime” fill, experience with Mercedes Benz 722.6 and later transmissions suggests more frequent changes are prudent. Fluid changes every 50,000 miles after the initial service are recommended to ensure longevity. The Mercedes Benz ML 320 transmission requires a specific, and relatively costly, Mercedes-Benz fluid. The fluid change procedure is also more complex than in older vehicles due to the absence of a dipstick for fluid level checking.
Finally, the system complexity of the Mercedes Benz ML 320, especially the CDI diesel engine (OM642), is significantly higher compared to older diesel engines. The fuel injection system’s sensitivity in CDI engines necessitates vigilance regarding fuel quality, as water or contaminants can cause injector failure. The fuel filter incorporates a water separator as a preventative measure.
Recommendation for Prospective Mercedes Benz ML 320 Buyers
Despite these potential drawbacks, a well-maintained Mercedes Benz ML 320 can be a rewarding vehicle to own. The key is to prioritize purchasing a model with a comprehensive and verifiable service history. Evidence of regular maintenance and addressing of potential issues will significantly contribute to a positive ownership experience. Checking for catalytic converter replacement, especially in models approaching or exceeding 100,000 miles, is advisable. By being informed about potential issues and diligent in maintenance, owners can enjoy the numerous benefits of the Mercedes Benz ML 320 for years to come.
