2015 Mercedes-Benz C 2.1L Diesel · JU51 AMG

The 2.1-litre (2143cc) diesel C-Class typically returns 50-65 mpg in real-world driving, making it economical for a vehicle of this size. As a 2015 car, it sits in a higher road tax bracket than newer diesels, with annual VED costs of around £30-£145 depending on the exact emissions band, though the standard rate applies for vehicles over £40,000 list price. Insurance for a C-Class diesel typically falls into groups 28-38, so expect mid-to-high premiums. Annual maintenance costs for a Mercedes of this age and mileage can be £500-£900, and with this mileage, budget for items such as brakes, tyres, and potentially suspension components. Estimated annual running costs are in the region of £2,000-£2,500, factoring in fuel, tax, insurance, and maintenance.

Without recorded defect details for the two failures, it is difficult to pinpoint exact concerns, but given the model's known issues, pay close attention to the suspension arms, tyres, and headlamps — these are the top three MOT failure reasons for the Mercedes C-Class according to aggregate data. The 2015 W205 generation can suffer from steering rack wear, so check for any knocking or uneven tyre wear. For the 2.1-litre diesel, inspect for oil leaks around the turbo and check the condition of the diesel particulate filter (DPF) and AdBlue system, as these are costly to replace. Examine the alloy wheels for kerb damage, the headlights for condensation or failed bulbs, and the tyres for uneven wear patterns. Finally, a diagnostic scan should be performed to check for any stored fault codes in the engine, transmission, and emissions systems.