2016 Mercedes-Benz GLC 2.1L Diesel · SL03 ACK

Recurring brake component degradation and a significant suspension failure define the mechanical profile of this Mercedes-Benz GLC. While the vehicle secured a pass during its most recent inspection on 20 August 2026, the record shows a persistent trend of pitting and scoring on the rear brake discs, which has been flagged as an advisory in both 2025 and 2026. This pattern of advisories follows a more serious failure in August 2025, where the vehicle failed on both nearside and offside rear coil springs being fractured or broken, alongside a major defect regarding an inoperative engine malfunction indicator lamp. Although the most recent result is a pass, the repeated mention of disc surface deterioration suggests a continuing need for attention to the braking system. The vehicle exhibits an unusually low mileage profile for a ten-year-old SUV, having covered only 42,660 miles to date. This averages to approximately 4,266 miles per year, which is significantly below the UK national average. From a mechanical standpoint, such low annual accumulation can be a double-edged sword; while it implies less wear on the drivetrain and engine internals, it often correlates with the exact type of brake disc corrosion and pitting observed in the MOT history. Vehicles that spend extended periods stationary or are driven only short distances frequently suffer from surface oxidation on brake discs due to insufficient heat cycles to clear surface rust, which aligns with the documented advisories. A prospective buyer should pay close attention to the braking system and the rear suspension during a test drive. Given the history of pitted and scored rear discs, listen for any rhythmic clicking or grinding noises when braking, and feel for any pulsation or judder through the brake pedal, which could indicate that the disc surface is no longer uniform. It is also essential to verify that the engine malfunction indicator lamp (MIL) is functioning correctly and does not trigger any warning lights on the dashboard during startup or under load, following the major failure recorded in 2025. Regarding the suspension, although the fractured coil springs were noted as a failure in the previous year, the current pass indicates they have been addressed. However, you should remain vigilant for any unevenness in the vehicle's stance or any audible knocks and clunks when driving over speed bumps or uneven road surfaces, which could suggest that other suspension components or bushes have been affected by the same usage patterns. Ensuring the rear braking components are not just visually acceptable but also free from excessive thickness or uneven wear is vital for the long-term safety of the vehicle.