2018 Mercedes-Benz E 1.9L Diesel · WN18 AVU

The defining mechanical characteristic of this 2018 Mercedes-Benz E-Class is a clear and recurring pattern of brake-related wear, with the braking system having dominated its MOT history over recent years. The most recent test on 2025-09-10 returned a pass, but it carried advisories for a nearside rear tyre worn close to the legal limit on its edge, alongside rear brake pads noted as wearing thin. Looking further back, the picture becomes more serious: a test on 2022-10-21 resulted in a fail due to a dangerous defect, specifically rear brake pads recorded at less than 1.5 mm thick, which represents an imminent stopping performance risk. The same 2022 visit also flagged worn and pitted front brake discs alongside thinning front pads. A clean pass in 2023 and another in 2021 suggest the braking components were renewed between these events, but the reappearance of pad advisories on the rear axle at the 2025 test indicates the consumables are once again approaching the end of their service life and should be considered a priority for replacement. Overall, the trend is one of moderate but persistent friction material wear consistent with a vehicle of this age and weight class. With approximately 59,462 miles accumulated over eight years, the car is running at roughly 7,433 miles per year, which sits comfortably within the typical annual mileage bracket for a privately used executive saloon. There are no significant gaps in the MOT testing record beyond the standard gaps for vehicles under three years old, and the mileage progression between tests appears steady and proportionate. There is no evidence of extended lay-up periods that might otherwise raise concerns about seized calipers, deteriorated brake fluid, or degraded underbody protection. Mechanically, this level of usage means the major drivetrain components, suspension assemblies, and interior wear points have all been regularly worked, which is generally preferable to a low-mileage example where rubber seals, fluids, and bushes can perish from disuse. The wear profile observed in the MOT data aligns logically with a car that has been driven consistently rather than one that has suffered from neglect or severe use. For a prospective buyer, the braking system should be the primary focus of any physical inspection and pre-purchase negotiation. The historical failure for dangerously thin rear pads means a thorough check of all four corners is essential; lift the vehicle or use a torch through the wheel spokes to confirm the remaining friction material on both front and rear pads, and run a finger along the visible edge of the brake discs to feel for a pronounced lip or ridges that would indicate disc replacement is due alongside the pads. On the test drive, listen for any grinding or scraping noise from the brakes on initial application, and pay particular attention to pedal feel, as a soft or spongy pedal could indicate air in the system or a fatigued master cylinder given the brake component history. Check for any pulling to one side under braking, which could point to a binding caliper or a seized brake hose, and ensure the handbrake holds the vehicle firmly on an incline, as rear caliper mechanisms on Mercedes E-Class models can be prone to sticking. Beyond the braking components, attention should turn to the tyres and suspension given the advisory recorded at the latest test. The nearside rear tyre was flagged as worn close to the legal limit and on its edge, a wear pattern that often suggests either an alignment issue or a worn rear suspension bush allowing the wheel to track incorrectly. During the test drive, listen for any clonking or knocking noises from the rear suspension over speed bumps or rough tarmac, and check for uneven tyre wear across the rear axle once the new tyre is fitted. Inspect the wheels from behind for any signs of rear camber misalignment, and consider a four-wheel alignment check as part of the purchase. Finally, because Mercedes E-Class vehicles of this generation are known for underbody corrosion around suspension mounting points and subframe areas, a thorough visual inspection on a ramp is strongly advised to confirm structural integrity before committing to purchase.