2017 Mercedes-Benz S-Class 3.0L Diesel · KT17 AAN

The most recent MOT test on 2026-04-10 resulted in a clean pass, though it included several recurring advisories and minor defects that suggest a stable but not entirely flawless maintenance profile. The pattern over the past four years shows no significant deterioration in structural integrity or major mechanical systems, with each test either passing or recording only minor issues. However, the consistent presence of advisories—particularly regarding brake disc wear, registration plate deterioration, and restricted access under the vehicle—indicates that while the car remains roadworthy, routine servicing may have been slightly delayed or overlooked in some areas. The absence of serious failures or repeated critical defects suggests that the vehicle’s fundamental roadworthiness is maintained, but the advisories warrant closer attention during a pre-purchase inspection to prevent escalation of wear or potential hidden issues. The recorded mileage of 64,159 miles for a 2017 S-Class represents a moderate annual usage rate of approximately 7,129 miles per year, which is within the expected range for this model’s age and typical driving conditions. Given that the vehicle has not accumulated excessive mileage in a short period, it is unlikely to have suffered from severe wear to high-mileage components like drivetrain elements or transmission fluids. However, the consistent annual mileage suggests regular use rather than prolonged periods of inactivity, which could contribute to gradual wear in consumables such as brake pads, tyres, and suspension components. It is also worth noting that the mileage does not appear to have been significantly accelerated in recent years, which is beneficial for assessing long-term maintenance needs. For a prospective buyer, the most critical areas to inspect during a thorough examination are the braking system and suspension, given the recurring advisories. Focus on the brake discs, particularly the front and rear, for signs of excessive pitting, warping, or uneven wear, which could indicate underlying issues such as binding calipers, warped discs, or hydraulic problems. Listen for abnormal brake noise or vibrations during a test drive, as these may signal disc warping, warble, or potential fluid contamination. Additionally, check for uneven tyre wear patterns, which could reveal misalignment, suspension issues, or steering problems. The registration plate deterioration is relatively minor but should be noted for cosmetic reasons and to ensure it does not impact future registration or insurance documentation. Beyond the advisories, the vehicle’s age and mileage make it essential to conduct a comprehensive physical inspection for signs of age-related degradation. Begin with the tyres, paying particular attention to sidewall perishing, which can compromise structural integrity and increase the risk of sudden blowouts. Check the tread depth and look for irregular wear, which may indicate alignment or suspension problems. Inspect the 12V battery for signs of corrosion on terminals, swelling, or poor electrical connections, as Mercedes-Benz vehicles often require battery replacement around 5–7 years of age due to the high demand on the electrical system. Verify that all fluids—particularly the engine oil, brake fluid, coolant, and differential fluid—are at the correct levels and free from contamination or discoloration, as these can degrade over time without regular servicing. Finally, examine the suspension components, including coil springs, shock absorbers, and suspension bushes, for signs of wear, cracking, or excessive play, which can lead to poor handling and increased road noise. A thorough inspection of the exhaust system for corrosion, leaks, or structural integrity is also advisable, as the S-Class is prone to rust in certain areas, particularly around the underbody and wheel arches. Lastly, check for any visible signs of structural stress, such as warping in the body panels or excessive flexing in the chassis, which could indicate long-term exposure to harsh conditions or lack of proper maintenance.