2011 Mercedes-Benz C 2.1L Diesel · AH57 AAK

The vehicle is currently roadworthy following a clean pass in January 2026 at 86,863 miles. However, the maintenance trend shows a significant period of instability during late 2025. While the car passed its July 2024 test without any defects, it subsequently suffered three consecutive failures within a five-month window. This sequence indicates a reactive approach to maintenance rather than proactive, as faults were only addressed once they failed official inspection rather than being identified during routine servicing. The mileage profile is notably low for a fifteen-year-old Mercedes Benz, averaging approximately 5,800 miles per year. The data reveals a sharp increase in usage between July 2024 (78,630 miles) and November 2025 (86,823 miles), where the vehicle covered over 8,000 miles in just sixteen months. Such rapid accumulation after long periods of lower mileage often leads to accelerated degradation of rubber-based components, which aligns with the multiple failures related to ball joints and dust covers recorded during this period. A buyer must prioritise the structural integrity of the offside rear sub-frame, which was flagged as likely to become detached in October 2025. Although the vehicle passed the subsequent test, such a structural defect suggests significant corrosion or mounting fatigue that requires a thorough physical inspection for deep rust. The history also highlights recurring issues with the front suspension geometry, specifically the ball joints and anti-roll bar linkages failing in close succession. Beyond the sub-frame, the supplementary restraint system warning lamp noted in August 2025 should be verified to ensure the airbag system remains fully functional. The previous failure for a structural tyre bulge and misaligned headlamps suggests a check of the current tyres for sidewall damage and the overall vehicle alignment is essential. The transition from multiple mechanical failures to a clean certificate suggests the necessary repairs were made, but the low-mileage nature of the car increases the risk of dry seals and perished rubber components.