2015 Mercedes-Benz C 2.1L Electric diesel · RF65 FFZ

The most recent MOT test on 2026-03-24 resulted in a passing outcome, but the vehicle’s history reveals a pattern of persistent and escalating mechanical issues rather than a stable maintenance trend. The failure on 2024-02-22 highlighted two major defects in the front lower suspension arms’ ball joints, which were subsequently confirmed again in 2025-03-10 with a severely deteriorated ball joint dust cover—a clear indication of progressive wear in these critical components. The 2026 failure included advisories about offside front tyre wear and a nearside front tyre below legal tread depth, alongside the ongoing front suspension concerns. While the 2023 and 2024 tests were clean, the intervening failures suggest that the suspension system has been under significant stress, likely due to either excessive load or poor alignment. The advisories on tyre wear—particularly the offside front and rear tyres repeatedly nearing legal limits—point to uneven loading or alignment issues that could worsen with continued use. The vehicle’s recorded mileage of 136,038 miles at a mere 11 years old is exceptionally high for its age, averaging approximately 12,367 miles annually—a rate that far exceeds typical usage patterns for a 2015 Mercedes-Benz C-Class. Such mileage accumulation typically indicates either heavy, frequent use or prolonged periods of high-stress operation, both of which accelerate wear on consumables like tyres, suspension components, and drivetrain elements. The absence of significant mileage gaps between MOT tests suggests consistent driving, which may have contributed to the rapid deterioration of suspension parts such as the ball joints and suspension arms. Additionally, the high mileage could imply that the vehicle has been subjected to rough road conditions, aggressive driving, or improper maintenance practices, all of which exacerbate wear rates. For a 11-year-old car, this level of usage is particularly concerning, as it may have led to premature failure of non-wear items like seals, bushings, and structural components that are not directly addressed in the MOT but are critical for long-term reliability. Given the recurring suspension and tyre defects, the prospective buyer must conduct a thorough inspection of the front lower suspension arms, ball joints, and associated bushes for signs of excessive play, binding, or physical damage. On a test drive, listen for unusual clunking or rattling noises from the front suspension, particularly when driving over bumps or at speed, as these could indicate failing suspension arms or ball joints. Inspect the front tyres for uneven wear patterns, which may suggest misalignment or camber issues, and check for any cracks or bulges in the sidewall—signs of tyre degradation that could compromise safety. The nearside front tyre failure in the latest MOT highlights the need to verify tread depth and overall tyre condition, as worn tyres increase braking distances and reduce traction. Additionally, examine the brake discs for signs of warping, scoring, or excessive thickness loss, as the 2022 advisory about worn rear discs suggests potential brake system fatigue. If the suspension arms or ball joints are confirmed to be beyond repair, the buyer should budget for replacement, as these components are critical to handling stability and ride comfort. For the tyre advisories, the buyer should replace the offside front and near/rear tyres to meet the legal minimum tread depth of 1.6mm, as these tyres are already dangerously worn and pose a significant safety risk. The front suspension failures indicate that the ball joints and suspension arms require immediate attention, with potential replacement of the severely deteriorated ball joint dust cover and any remaining worn components. Given the high mileage and repeated MOT failures, the buyer should also consider a comprehensive mechanical inspection by a qualified technician to assess the condition of the steering system, exhaust components, and other non-MOT-checked items like the drivetrain, engine mounts, and exhaust emissions system. If the vehicle has been in use for over 11 years with such high mileage, it is advisable to check for signs of corrosion on the chassis, particularly around the wheel arches and undercarriage, as standing fluids and road debris can accelerate rust. Finally, verify that the vehicle’s service history includes scheduled fluid changes—particularly brake fluid, differential fluid, and coolant—since fluid degradation accelerates wear in mechanical systems, and these should be replaced according to manufacturer recommendations, even if the MOT has passed.