2016 Mercedes-Benz GLC 2.1L Diesel · MW16 APU

Progressive front‑brake disc wear, highlighted by repeated advisories in 2025 and again in the April 2026 test, together with a rear‑pad failure recorded in April 2025, defines the mechanical narrative of this GLC. The latest MOT on 20 April 2026 was passed, but the test still flagged the front discs as worn, pitted or scored and noted a cut on the front tyre, confirming that the braking system is approaching its service limits and that tyre condition requires attention. At 78 721 miles the vehicle averages just under 8 000 miles per year, a usage rate that sits comfortably within normal expectations for a ten‑year‑old premium SUV. The MOT chronology shows annual testing with only a modest fifteen‑month interval between the February 2022 and May 2023 examinations, suggesting no prolonged periods of inactivity that would hide hidden wear. This mileage pattern aligns with the observed brake‑disc wear and the need for periodic replacement of consumables typical of a vehicle with this level of use. When inspecting the brakes, verify the remaining thickness of the front discs and listen for any high‑pitched squeal or low‑frequency pulsation under firm braking, which would indicate further scoring or thinning. Examine the rear pads for uneven wear or glazing, and assess pedal feel for any sponginess or increased travel that could signal that the rear pad replacement noted in 2025 has not been addressed. A thorough visual check of both front tyres for the documented cut and of the off‑side rear tyre for the previously reported nail is essential; any exposed cords or sidewall damage should prompt immediate replacement. Beyond the braking system, confirm that the registration plates now meet the legal specification, as the 2021 failure was purely a compliance issue. While the MOT record shows no suspension, exhaust or structural defects, a prudent test drive should still include a feel for steering pull, unusual noises over bumps and any vibration that could hint at underlying wear not yet captured by the tests. Ensuring the brakes and tyres are refreshed will bring the vehicle back to a consistently roadworthy state.