The Mercedes Benz Ml320 CDI, particularly models around the 2008 mark, represents a robust and capable SUV option, especially for those considering a pre-AdBlue diesel variant. Based on personal experience with a 2008 ML320 CDI, this review dives into the ownership experience, highlighting both the strengths and weaknesses of this model to aid potential buyers and current owners.
The Enduring Appeal of the ML320 CDI: Pros
This vehicle earns its nickname “the beast” for good reason. The diesel engine provides ample power to handle diverse driving conditions, making it a confident highway cruiser. Fuel economy is commendable for its class, achieving mid-20s MPG on diesel, a significant advantage over the gas-powered counterparts that demand premium fuel and deliver mid-to-high teens MPG. The interior, while exhibiting some cost-saving measures typical of its era, is generally well-assembled and durable. A key benefit of the pre-2009 ML320 CDI is the absence of AdBlue, simplifying maintenance and freeing up space for a spare tire, albeit a compact one. Passenger space is generous in the second row, comfortably accommodating adults even with taller front occupants.
Addressing the “Warts”: Common ML320 CDI Issues and Considerations
While a strong performer overall, the Mercedes Benz ML320 CDI (W164) does have areas where it shows its age or requires specific attention. The infotainment system, while boasting a powerful audio output, lags behind modern standards in Bluetooth and iPod integration. Navigation, though functional, feels clunky compared to contemporary systems. A point of potential annoyance is the power tailgate, which can become temperamental, often requiring manual assistance. Tire replacement can be a costly affair, especially with the original 19-inch sizes, and factor in the likely need to replace Tire Pressure Monitoring System (TPMS) sensors concurrently.
Maintenance, particularly at dealerships, can be expensive. DIY oil changes are feasible with a topsider, but strict adherence to “Mobil1 ESP Formula M 5W40” and a substantial nine-quart capacity adds to the cost. Scheduled oil changes are recommended every 10,000 miles, and fuel filter replacements every 20,000 miles. Transmission fluid maintenance is crucial; despite manufacturer claims of “lifetime” fluid after an initial 40,000-mile service, fluid changes every 50,000 miles are advisable, using specific Mercedes-Benz fluid and a complex, dipstick-less procedure. The engine and systems complexity, particularly for those accustomed to older diesel engines, can be daunting, with the common-rail direct injection (CDI) system being sensitive to fuel contaminants, necessitating careful fuel sourcing.
Key Maintenance Checks for a Used Mercedes Benz ML320 CDI
For those considering a used Mercedes Benz ML320 CDI, especially models approaching or exceeding 100,000 miles, certain checks are highly recommended. Inquire about the catalytic converter replacement history, as this can be a significant expense if it hasn’t been addressed. Given the CDI fuel system’s sensitivity, reviewing fuel filter replacement records and inquiring about fuel sourcing habits of previous owners can be insightful. Due to the transmission’s complexity and importance of fluid maintenance, verify the transmission service history.
Conclusion: Is the Mercedes Benz ML320 CDI a Good Buy?
A well-maintained Mercedes Benz ML320 CDI can be a rewarding ownership experience, offering a blend of power, diesel fuel economy, and Mercedes-Benz build quality. However, potential buyers should be aware of the maintenance demands, potential for age-related issues in electronics and components like the power tailgate, and the importance of diligent maintenance, particularly concerning fluids and fuel quality. Thorough service records and a pre-purchase inspection are crucial when considering a used ML320 CDI to ensure a reliable and enjoyable ownership journey.
