2015 Mercedes-Benz CLS 2.1L Diesel · FN15 PNL

The vehicle is currently roadworthy but the maintenance trend shows a shift toward reactive rather than proactive upkeep. While the car passed its 2024 and 2025 tests without defects, the most recent inspection in March 2026 at 149,276 miles revealed multiple advisories. The presence of an insecure exhaust heat shield, thin brake pads on both axles, and uneven wear across all four tyres indicates that routine consumable replacements have been neglected until they reached legal limits or failure points. At 11 years old, the mileage of 149,276 miles reflects high-usage patterns averaging approximately 13,500 miles per year. The data shows consistent and heavy use, with a significant jump of nearly 9,000 miles between February 2025 and March 2026. This rate of accumulation puts considerable strain on the Mercedes-specific suspension components and braking system. The gap-free records between 2022 and 2025 suggest a period of relative stability, but the recent frequency of faults contradicts the previous clean tests. A buyer must prioritise inspecting the braking system and suspension, as the record shows a recurring history of worn discs and pads. The tester flagged pitted front discs in 2023 and thin pads on all four wheels by 2026, suggesting the calipers or wheel hubs may require close attention. The uneven wear noted on all four tyres in the latest test is a specific indicator of potential alignment issues or worn control arm bushes, which are common failure points on high-mileage CLS models. Physical inspection of the exhaust mounting for corrosion and the structural integrity for rust is also essential, as high-mileage luxury vehicles often suffer from accelerated wear on underbody components.