The Mercedes-Benz ML-Class, particularly models like the 2003 Mercedes Benz Ml350, holds a complex place in automotive history. When brochures for the first generation ML (W163) landed, they depicted what seemed like the epitome of cool and luxury SUVs. For many, including myself at the time, these vehicles represented the pinnacle of automotive desirability. The appeal was undeniable, blending Mercedes-Benz prestige with the burgeoning SUV trend. However, this initial allure soon faded for those who came to understand the true meaning of “quality” and “reliability” in a vehicle.
Alt text: Front profile of a silver 2003 Mercedes Benz ML350 SUV, showcasing its classic design.
The journey of the ML-Class began unexpectedly with a collaboration. In 1991, Mercedes-Benz recognized the growing demand for SUVs and realized their existing G-Wagen was aging. Seeking a fresh entry into the market, they partnered with Mitsubishi Motors to jointly develop a new SUV. Announced in June 1991, the plan was to create two versions, one for each brand, both based on the Mitsubishi Montero/Pajero platform. However, by May 1992, the project was abruptly canceled, officially due to vague “technical problems.”
Alt text: Side view of a 1995 Mitsubishi Montero, highlighting its platform sharing history with the early Mercedes ML-Class development.
Speculation suggests that the cancellation might have stemmed from conflicting interests with Mitsubishi’s recently launched Montero or disagreements on market positioning. Regardless, Mercedes had lost valuable time. The G-Wagen continued its run, but the need for a new SUV was pressing. Post-Mitsubishi, Mercedes decided to forge ahead independently, developing a completely new vehicle. Recognizing the burgeoning US SUV market and aiming to mitigate currency exchange risks, they chose the United States as the location for their first overseas plant in Tuscaloosa, Alabama. This plant, now producing GL-Class and C-Class models, was initially solely dedicated to the new SUV.
Back in Germany, development progressed rapidly. Mercedes previewed the new model with the Vision AA concept at the 1996 Detroit Auto Show, hinting strongly at the ML’s design direction. Finally, in 1997, the first Mercedes ML320 rolled off the Tuscaloosa production line, met with significant acclaim. Motor Trend recognized it as their Truck of the Year in 1998. The reasons for this praise were clear: the refinement and luxury expected of a Mercedes-Benz were now available in a contemporary SUV format. Technological advancements like stability control and a traction control system mimicking locking differentials were introduced, offering improved road manners compared to the more rugged G-Class.
Alt text: Exterior shot of the Mercedes-Benz Tuscaloosa plant in Alabama, the birthplace of the first generation ML-Class.
However, beneath the surface of innovation and stylish design, the first generation ML, including early models and even the 2003 Mercedes Benz ML350 to some extent, harbored significant quality issues, reminiscent of Mercedes’ less glorious periods. Jeremy Clarkson’s infamous test drive highlighted glaring problems like exposed screws, poorly fitted trunk releases, and substantial panel gaps. Off-road excursions revealed further deficiencies, such as sunroof weather stripping detaching.
Owner reports corroborated these initial impressions, detailing power steering fluid leaks, oil sludging with recommended 10,000-mile oil change intervals, and pervasive issues with door locks. The “sealed for life” gearbox also proved problematic. Fuel pump and sender failures, along with catalytic converter problems, were frequently reported. This was far from the benchmark reliability associated with Mercedes-Benz icons like the W123, W124, and W126. The initial ML-Class generation stood in stark contrast to Mercedes’ long-standing reputation for engineering excellence.
Alt text: Rear view of a first generation Mercedes ML-Class highlighting panel gaps and build quality concerns.
Mercedes-Benz acknowledged these shortcomings and undertook efforts to address the most significant quality concerns. The refreshed 2002 model year, which includes the 2003 Mercedes Benz ML350, represented a substantial improvement. While issues like finicky window switches and potential 5G-Tronic transmission slippage after considerable mileage persisted, the post-refresh models were notably more reliable. The 2003 Mercedes Benz ML350, being part of this improved generation, benefitted from these enhancements.
Alt text: Interior view of a first-generation Mercedes ML-Class dashboard, illustrating the cabin design and potential areas of quality concerns.
This progress continued until 2005, when the W164 ML-Class replaced its predecessor. The W164 marked a significant leap forward in reliability from its inception. Mercedes-Benz enthusiast forums, while acknowledging the W163’s reliability issues, report far fewer problems with the W164, with taillight bulb longevity being a relatively minor common complaint.
Alt text: A newer generation Mercedes ML-Class (W164), representing the improved reliability and build quality after the initial W163 issues.
Was labeling the first-generation ML, including early models and to a lesser extent the 2003 Mercedes Benz ML350, a “deadly sin” too harsh? Perhaps the teething problems were an inevitable consequence of a completely new design built in a new location with a new workforce, compounded by inexperience in the SUV segment and amplified by high brand expectations. However, those brand expectations existed for a reason. The “spare no expense” Mercedes-Benz of the past would have ensured every ML off the line met uncompromising standards, regardless of development costs. But the W163, like the W210 E-Class, emerged from a Mercedes-Benz facing pressure from competitors like Lexus and prioritizing cost-efficiency. “Das Beste oder nichts” – “The best or nothing” – seemingly became more of a slogan than a guiding principle. Deviating from core values in such a fundamental way arguably constitutes a “deadly sin” in the context of brand legacy and customer trust.
Alt text: Close up detail of the Mercedes-Benz star emblem on a first generation ML-Class, symbolizing the brand’s historical quality promise that was challenged by this model.
