If you’re in the market for a pre-owned luxury SUV, the Mercedes Ml, particularly the models from the mid to late 2000s, might be on your radar. Having spent considerable time with a 2008 Mercedes ML320 CDI, essentially the same vehicle as the 2007 model, I can offer some insights to help you decide if this vehicle is the right fit for you. Notably, the 2008 ML320 CDI, like the 2007, avoids the complexities of AdBlue, which was introduced in later models starting in 2009.
My experience began with a purchase from a local Mercedes-Benz dealer. The vehicle history, confirmed by Carfax and previous owner information in the Vehicle Master Inquiry (VMI), indicated it was a local car meticulously serviced at the dealership every 10,000 miles. With 106,000 miles on the clock at purchase, and now at 113,000 miles, my ownership has provided a solid understanding of this Mercedes ML model’s strengths and weaknesses.
It’s suspected the previous owner traded it in due to a clogged catalytic converter, a repair that can cost around $3,000 at a dealership. Fortunately, the dealer replaced this before sale. If you are considering a Mercedes ML with similar mileage, verifying the catalytic converter replacement is a crucial point to check.
The Upsides of a Mercedes ML (ML320 CDI)
This Mercedes ML, affectionately nicknamed “the beast,” truly lives up to its name in terms of power. It feels capable of tackling almost anything. As a highway cruiser, the diesel model shines, achieving mid-20s MPG. While gasoline models, requiring premium fuel, offer mid to high teens MPG, the diesel’s efficiency is a significant advantage, especially with diesel prices often comparable to premium gasoline.
The interior quality is generally high. While cost-cutting measures are noticeable in certain areas, the overall impression is one of solid construction and reasonable luxury for its age. A key benefit of the pre-AdBlue models is the inclusion of a spare tire, although it is a compact spare. Passenger space is generous in the second row, accommodating adults comfortably unless front passengers maximize legroom. Even at 6’3″, headroom and legroom are ample with the front seat positioned for comfortable driving.
Addressing the “Warts”: Areas to Consider
While the audio system delivers impressive sound quality, even approaching competition levels of bass, the Bluetooth and iPod integration are dated by today’s standards. Functionality is present, but it lacks the seamlessness of modern systems, notably missing A2DP support common in later vehicles. Similarly, the navigation system, while functional, feels clunky compared to contemporary units. Negotiating for an updated navigation DVD with the dealer is advisable, as these can be costly otherwise.
The power tailgate can be temperamental. Occasional issues with automatic opening suggest potential weakness in the system, possibly a hydraulic pump issue. A slight manual assist often helps it complete the opening process. This complexity, involving a hydraulic pump and roof-mounted cylinder, hints at potential future maintenance needs.
Tire costs are significant. The factory 19-inch tires are expensive to replace, and anticipate needing new Tire Pressure Monitoring System (TPMS) sensors with tire changes. A set of Continental tires cost around $995, with TPMS sensors adding another $260 when purchased online.
Maintenance, especially at dealerships, can be costly. DIY oil changes are feasible, particularly with a topsider oil extractor. However, strict adherence to “Mobil 1 ESP Formula M 5W40” is crucial, requiring approximately 9 quarts per change at around $12 per quart. Oil changes are recommended every 10,000 miles, with fuel filter replacements every 20,000 miles.
Transmission fluid maintenance is critical. Mercedes initially suggested a “lifetime” fill after a 40,000-mile initial change, a concept proven problematic in earlier models. Regular fluid changes every 50,000 miles after the initial service are highly recommended. This requires a specific Mercedes-Benz fluid, also costly, and a complex procedure without a traditional dipstick for level checking.
The engine and systems are significantly more complex than older diesel engines. The OM642 engine’s intricate design requires careful maintenance and attention to fuel quality. The CDI fuel injection system is sensitive to water and contaminants, making fuel source selection important. The fuel filter does incorporate a water separator, but preventative measures are wise.
Conclusion: Is a Used Mercedes ML Right for You?
Despite these potential drawbacks, a well-maintained Mercedes ML, particularly the 2007-2008 ML320 CDI, remains a compelling option in the used luxury SUV market. Prioritizing a vehicle with comprehensive service records is paramount. Understanding the potential maintenance points, especially concerning the catalytic converter, transmission, and fuel system, will help ensure a positive ownership experience. If you value power, diesel efficiency (in the CDI model), a comfortable interior, and are prepared for potentially higher maintenance costs associated with a luxury vehicle, a used Mercedes ML is definitely worth considering.
