2017 Mercedes-Benz C 2.1L Diesel · VF66 ATV

A pattern of suspension and brake component wear is beginning to emerge on this C-Class, with three of the last four tests flagging mechanical advisories rather than passing clean. The 2026 test on 12 January was the latest recorded, passing with a slight play finding on the nearside front lower suspension arm ball joint and uneven inner-edge tread wear on both rear tyres. The 2025 pass recorded pitted or scored front brake discs and thinning rear brake pads, while 2024 and 2023 produced a mixture of tyre cracking advisories and clean outcomes. The single failure on 24 January 2022 was tyre-related rather than structural, with both rear tyres marked as not fitted in accordance with sidewall instructions, and this was remedied the same day under a subsequent pass. The accumulating pattern of front suspension, brake, and tyre advisories across consecutive years points to a vehicle entering a phase where chassis consumables are beginning to demand attention, even though the test record shows no structural or corrosion failures to date. Mileage accumulation on this 2017 Mercedes-Benz C-Class is notably low, with 32,261 miles recorded across approximately nine years of motoring, equating to around 3,585 miles annually. There are no significant gaps in the annual testing record, with continuous MOT entries from 2020 through to 2026, suggesting the vehicle has remained in regular use rather than being laid up for extended periods. Low annual mileage of this nature typically results in less wear on high-stress drivetrain components such as the engine, clutch, and transmission internals, but it can accelerate degradation of certain items through underuse. Standing time allows brake discs to corrode and pads to seize in their caliper guides, front suspension ball joints and bushes to develop surface rust that hastens wear once the vehicle is driven, and tyres to perish or deform through prolonged static loading. The recorded mileage therefore presents a mixed mechanical picture, with reduced mechanical fatigue but elevated risk of seized or corroded ancillary components that may not surface until the vehicle is exercised more vigorously. From a buyer perspective, the front suspension ball joint play flagged at the latest test warrants close attention, as slight movement can progress rapidly to a more serious defect and would justify a physical inspection of the nearside front lower arm, including the inner and outer bushes and the anti-roll bar drop links. On a test drive, listen for clonks or knocks from the front end over speed humps and uneven road surfaces, and feel for any vagueness or knocking through the steering wheel during low-speed manoeuvres. The uneven rear tyre wear noted alongside it suggests a possible rear axle geometry issue or simply that the tyres have been under-inflated or left standing for long periods, so a four-wheel alignment check and inspection of the rear trailing arm bushes should be considered. Given that the 2024 and 2025 tests recorded pitted front brake discs and thinning rear pads, prospective buyers should budget for replacement brake discs and pads on the front axle and verify that the rear pads have been renewed since the advisory was issued. On the road, any grinding, vibration through the brake pedal, or pulling to one side under braking would indicate the discs have deteriorated beyond the advisory threshold. The earlier tyre cracking advisories on both front tyres in 2022 and 2023, combined with the failure for incorrectly fitted rear tyres, indicate that previous replacements were not always carried out to specification or were left to deteriorate in service. While there is no recurrence of cracking advisories in the 2024 or 2025 tests, the current rear tyres showing uneven inner-edge wear suggest they too are approaching the end of their useful life, and all four should be inspected for age-related perishing, tread depth, and sidewall condition. The absence of any structural corrosion, exhaust, lighting, or emissions advisories across the eight tests recorded is a positive element of the history, indicating that the bodywork, undertray, and drivetrain have not yet raised MOT concerns. A buyer should still carry out a thorough visual inspection of the underbody, paying particular attention to the front subframe mounting points, brake pipe runs, and exhaust hangers, as these are common ageing concerns on C-Class chassis of this generation that may not yet have manifested in test defects but could be approaching the point of advisories given the vehicle's age.