2016 Mercedes-Benz C 1.6L Diesel · LS66 MDK

The vehicle most recently passed its MOT on 5 March 2026, accompanied by three advisories covering rear tyre perishing on both sides and slight play in the offside front lower suspension arm ball joint. Reviewing the broader history, the maintenance trend is broadly stable with mild deterioration in specific areas rather than any acute failure pattern. The car passed cleanly in 2022 and 2024, and the only outright failure in the recorded period was a 2021 major defect concerning a missing brake pedal anti-slip provision, which is a minor fitment issue rather than a mechanical wear failure. However, advisories have clustered around front brake discs and pads, rear brake disc condition, and suspension joints, suggesting these components are now entering a phase where genuine service attention is warranted. The recurrence of brake disc wear advisories across multiple tests, though not escalating to failure, points to an ongoing wear progression worth monitoring closely. With approximately 56,884 miles recorded over ten years, the vehicle has averaged around 5,688 miles annually, which is notably low for a car of this age. There are visible gaps in the MOT history between late 2021 and late 2022, and again before the 2024 test, suggesting periods of reduced activity or possible lay-up. Low annual mileage can be broadly beneficial for major drivetrain components, but it brings its own concerns: prolonged standing encourages brake disc surface corrosion, caliper slide and piston seizure, and accelerated ageing of rubber components such as tyres, bushes, and seals. The pattern of brake disc pitting advisories over several tests is consistent with corrosion caused by infrequent use rather than friction wear alone, and a prospective buyer should treat this as a likely symptom of the car's usage profile rather than heavy-duty braking demand. Given the advisories flagged on the 2026 test, a physical inspection should focus on the rear tyres, checking the sidewalls and tread face for cracking, perishing, or any bulges that could indicate age-related rubber degradation even if tread depth remains adequate, as ten-year-old tyres are approaching the point where replacement is advisable regardless of wear. The offside front lower suspension arm ball joint should be evaluated for excessive free play by hand on a ramp or by listening for clonks or knocking over speed bumps and during slow-speed turning manoeuvres; any worsening since the advisory was issued would warrant immediate replacement. The front brake discs, previously flagged as not excessively lipped but with wear noted, should be inspected for lip measurement against minimum thickness, and the calipers checked for smooth retraction, as seized calipers on a low-mileage vehicle are a common cause of uneven pad wear and pulling under braking. On a test drive, listen for any binding or dragging sensation from cold, and verify that the car rolls freely when released in neutral on level ground. Beyond the recorded defects, several age and mileage-appropriate checks are strongly recommended before purchase. The 12V battery should be load tested, as Mercedes-Benz vehicles of this era are sensitive to voltage drop, and a weak battery can cause a cascade of electronic faults. Brake fluid should be verified as within its two-year replacement cycle regardless of mileage, as fluid is hygroscopic and degrades on a calendar basis, particularly relevant for vehicles with ABS and stability systems. Coolant and transmission fluid service history should be confirmed, as these are often neglected on low-mileage cars where owners assume infrequent use removes the need for periodic changes. Finally, inspect the underside and wheel arches for any standing corrosion, check for fluid leaks from the power steering rack and engine sump, and confirm that all warning lamps extinguish promptly on ignition, since intermittent electronic issues are frequently the first sign of broader age-related concerns on a Mercedes-Benz of this generation.