2019 Mercedes-Benz GLC 1.9L Diesel · FH19 SWY

The 2019 Mercedes-Benz GLC currently holds a valid MOT pass dated 4 June 2026 at 84,224 miles, yet the maintenance trend is best described as borderline rather than stable. The car failed its initial attempt on 3 June 2026 at the same recorded mileage, with the tester flagging a split or insecure nearside front outer constant velocity boot, a defect that allows dirt ingress and can destroy the joint if left unrepaired. Both front tyres were noted as worn close to the legal limit and worn on the edge, while the windscreen washer system was also flagged for providing insufficient liquid. The following day the car passed, suggesting the CV boot and washer fluid were addressed, but the front tyre wear pattern remains an active advisory. A pass is in place, yet the nature of the June 2026 failure points to a vehicle that was presented in below-average condition. The mileage accumulation tells a story of sustained high use. Between the clean pass on 11 July 2023 at 37,411 miles and the pass on 29 May 2025 at 64,702 miles, the car covered 27,291 miles in roughly twenty-two months, averaging over 14,800 miles per year in that window. The subsequent jump from 64,702 miles in May 2025 to 84,224 miles by June 2026 adds another 19,522 miles in just over twelve months, pushing the annualised rate to approximately 19,500 miles. For a seven-year-old GLC, this is well above the typical 10,000 to 12,000 miles per year. Such sustained high mileage accelerates wear on consumables and places greater stress on suspension bushes, brake discs and pads, drivetrain components, and exhaust mountings. The recurring tyre wear pattern deserves closer scrutiny. Front tyres have appeared as worn close to the legal limit and worn on the edge in both the 2025 and 2026 tests, while the 2025 test also flagged cracking or perishing on both fronts and both rears at 1.6mm. This suggests either persistent alignment issues, aggressive driving, or a combination of both. A buyer should have the front and rear suspension geometry checked professionally, paying particular attention to front wishbone bushes, track rod ends, and rear trailing arm bushes, all of which deteriorate faster under high-mileage use. The split CV boot flagged in June 2026 is another indicator of heavy use, and the joint itself should be inspected for play or clicking under load, not merely assumed sound because the boot was replaced. Beyond the tyres and CV joint, the high-mileage pattern warrants a thorough inspection of braking components, including disc thickness, pad life, and any binding tendencies that may not have triggered a failure. Exhaust emissions were not flagged in the most recent tests, but the 2025 pass at 64,702 miles came with multiple tyre advisories, suggesting basic upkeep was sometimes reactive rather than preventive. A compression test and inspection for oil leaks around the engine and gearbox would also be prudent given the mileage. The MOT record shows a vehicle that is legally roadworthy today but has been worked hard and may require above-average ongoing maintenance to remain reliable.