2011 Mercedes 1824 6.4L Diesel · KP61 BCU

The Mercedes-Benz 1824 has maintained a remarkably clean MOT history over the past three years, with no defects recorded in any of its five tests since June 2022. The most recent assessment in October 2025—just nine months ago—confirmed full roadworthiness at 303,375 miles, following a brief but unexplained failure the previous day at 303,332 miles. This near-back-to-back pass/fail sequence is unusual, though the absence of any recorded defects suggests it may have been an administrative or minor procedural issue rather than a mechanical concern. The trend is stable, with consistent compliance across all tests, indicating that major structural or safety-critical components have been well-maintained or replaced proactively. The vehicle’s mileage accumulation is aggressive for its age, averaging around 20,225 miles per year over its 15-year lifespan. Between the 2022 and 2025 tests, mileage increased by roughly 12,255 miles in just over three years—a rate that would accelerate wear on suspension bushes, coil springs, and brake components if not addressed. The gap between the 2024 and 2025 tests (around 4,739 miles in 12 months) is more moderate, suggesting either a period of reduced use or a temporary slowdown in mileage. However, the rapid accumulation prior to that—from 291,120 miles in June 2022 to 298,636 miles in September 2024—implies sustained heavy use, which could mask deferred maintenance if not properly documented. Given the lack of recorded defects, a buyer should prioritise a thorough inspection of high-wear areas that may not have been flagged in MOTs but are critical at this mileage. Suspension components—particularly rear coil springs and bushings—should be checked for fatigue or sagging, as these are prone to failure in high-mileage diesel vehicles. Binding or uneven brake performance should be tested, especially if the car has been driven hard, as worn pads or seized calipers can develop without MOT detection. Exhaust emissions and DPF health (if applicable) may also warrant scrutiny, given the diesel engine’s age and mileage. Structural corrosion, particularly around wheel arches and underseal, should be examined closely, as rust can compromise safety without immediate MOT consequences. While the MOT record is reassuring, the vehicle’s age and mileage demand a pre-purchase inspection by a qualified Mercedes-Benz specialist. Focus on components not routinely checked in standard MOTs, such as differential fluid condition, timing belt integrity (if applicable), and any history of turbocharger or fuel system interventions. The absence of defects does not preclude hidden wear—this car’s longevity will depend on what lies beneath the surface.